9 Best Bobbins for Brother XR3774 (October 2026)

The best bobbins for the Brother XR3774 include the Outus Assorted Colors 50 Prewound Bobbins Compatible for color matching, the Simthread 144pcs Size A SA156 Embroidery Prewound for white thread, and the StitchTech XC3152221 Bobbin Case for Brother for XR case checks.

On this page (7 sections)

1. Which bobbins for Brother XR3774 owners are worth considering?
2. How should you choose bobbins for the Brother XR3774?
3. Are Size A, Class 15 and SA156 interchangeable?
4. Should you buy prewound or reusable bobbins?
5. How do you set up and care for a bobbin?
6. What mistakes cause bobbin trouble?
7. Which bobbins should XR3774 owners choose?

The best bobbins for Brother XR3774 owners are the ones confirmed by the machine manual. This guide compares prewound options for color range, thread details and pack size, while pointing out where a product’s model coverage leaves a fit question.

A bobbin can look familiar and still be the wrong type for a particular machine. For machine features and setup context, see the Brother XR3774 review.

Check the XR3774 manual before ordering, especially if you are switching from the bobbins supplied with the machine or trying prewound thread for the first time.

For a primer on common shapes and materials, see quilting machine bobbin types and differences. If you’re new to sewing machine bobbins, best bobbins for beginners covers the basics of choosing and organizing them.

Our picks at a glance

1. 1
   Best for color matching

   Outus Assorted Colors 50 Prewound Bobbins Compatible

   9.5/10 our score

   See it on Amazon
2. 2
   Best for white thread

   Simthread 144pcs Size A SA156 Embroidery Prewound

   9.4/10 our score

   See it on Amazon
3. 3
   Best for XR case checks

   StitchTech XC3152221 Bobbin Case for Brother

   9.2/10 our score

   See it on Amazon

4. 4

   HimaPro 144 White Prewound Bobbins for Embroidery

   Best for Size L machines
   Check it
5. 5

   StiVerse 210 Pcs Prewound Bobbin Thread Set

   Best for color variety
   Check it
6. 6

   EBOOT 144 Pieces Prewound Bobbins Sewing Thread

   Best for medium assortments
   Check it
7. 7

   HimaPro 72 PCs Assorted Color Bobbins

   Best for sewing kits
   Check it
8. 8

   Brother SA159 Sewing Machine Bobbins for PQ1500/juki

   Best for PQ machines
   Check it
9. 9

   Bobbin Case for Brother and Babylock Sewing

   Best for PR machines
   Check it

Which bobbins for Brother XR3774 owners are worth considering?

Outus is the color-focused choice, and Simthread is the bulk option for white thread. The products below are ranked by how useful their stated size, thread details, pack format and compatibility information are for a buyer who still needs to verify the XR3774 fit.

Outus Assorted Colors 50 Prewound Bobbins Compatible: Best for color matching

1

Outus Assorted Colors 50 Prewound Bobbins Compatible: Best for color matching

9.5/10Our score

• 50 prewound bobbins
• 50 thread colors
• Size A, Grade 15
• Clear storage box

A 50-color assortment in a clear box, with bobbins that can be reused after the thread runs out.

See it on Amazon

Pros

• 50 assorted colors
• Bobbins sit in separate box positions
• Bobbins can be reused

Cons

• XR3774 is not named in the compatibility details
• Thread weight is not specified

Outus combines 50 bobbins with 50 thread colors in a clear plastic box. Each bobbin has a separate position, so you can scan the shades before choosing one, and the empty bobbins can be reused after the thread is gone.

The bobbins are labeled Size A, Grade 15, and Brother is among the compatible brands. XR3774 is not named, so compare the label with the manual before inserting one.

This set suits everyday repairs and crafts where a close color match matters more than having a long supply of one shade. It includes 0.25 kg of thread in total, but the thread weight and length per bobbin are not specified.

Choose Outus if color variety and clear storage matter to you. Skip it if you need a confirmed XR3774 fit before buying or want a stated thread weight for a specific project.

Simthread 144pcs Size A SA156 Embroidery Prewound: Best for white thread

2

Simthread 144pcs Size A SA156 Embroidery Prewound: Best for white thread

9.4/10Our score

• 144 white prewound bobbins
• Size A, Class 15, SA156
• 60 wt polyester thread
• 140 yards per bobbin

A large supply of white prewound thread in a stated Size A, Class 15, SA156 format. Check the machine manual before using prewound bobbins.

See it on Amazon

Pros

• 144 white bobbins
• Thread weight and length are specified
• Brother is included in its compatibility list

Cons

• White only
• XR3774 is not named in the compatibility details

Simthread supplies 144 white prewound bobbins labeled Size A, Class 15 and SA156. Each has 140 yards of 60 wt polyester thread, making this the clearest choice here when you want one consistent color in a large quantity.

Brother is included in the stated compatibility group, along with Babylock, Janome, Juki and Elna. XR3774 is not named, so confirm the fit and follow the machine’s instructions for prewound bobbins.

This pack suits frequent sewing or embroidery where white lower thread is useful and replenishing a supply matters more than keeping several colors on hand. Skip it if you regularly match lower thread to fabric or need a product that names the XR3774 specifically.

For a self-wound supply that matches your project thread, follow how to wind a bobbin.

StitchTech XC3152221 Bobbin Case for Brother: Best for XR case checks

3

StitchTech XC3152221 Bobbin Case for Brother: Best for XR case checks

9.2/10Our score

• Replacement bobbin case
• XC3152221 and XE7560001 references
• Brother XR series included

A replacement case option whose compatibility information includes Brother XR series. Confirm the exact part number for your XR3774 before ordering.

See it on Amazon

Pros

• XR series is included in the compatibility details
• Two part references are given

Cons

• XR3774 is not individually named
• A bobbin case is not a bobbin

This is a bobbin case, not a set of bobbins. It references parts XC3152221 and XE7560001 and includes Brother XR series in its compatibility details, so it may be relevant when you need a replacement case.

XR3774 is not individually named. Check the exact part number in the manual or confirm it with Brother support before ordering, since a case must match the machine’s lower hook assembly.

Consider this only when replacing a case and the part number matches. Skip it if you only need spare bobbins or thread; a replacement case does not answer which bobbin size to buy.

See what a bobbin case does if you need to distinguish the case from the bobbin itself.

HimaPro 144 White Prewound Bobbins for Embroidery: Best for Size L machines

4

HimaPro 144 White Prewound Bobbins for Embroidery: Best for Size L machines

8.9/10Our score

• 144 white prewound bobbins
• Size L, SA155
• 60 wt polyester thread
• 140 yards per bobbin

This white embroidery thread set uses Size L, SA155 bobbins. Check your XR3774 manual carefully because several other choices here use Size A, Class 15.

See it on Amazon

Pros

• 144 white bobbins
• Thread weight and length are specified
• Several embroidery machine brands are named

Cons

• Size differs from the Class 15 choices
• XR3774 is not named in the compatibility details

HimaPro offers 144 white prewound bobbins with 100% polyester thread, 60 wt and 140 yards per bobbin. The bobbins are Size L, SA155, unlike the Size A and Class 15 labels on several other picks.

The compatibility details name Brother among several embroidery machine brands, but they don’t name the XR3774. Because this uses a different size label, buy it only if your machine instructions call for Size L, SA155.

This set suits an owner of a compatible Size L embroidery machine who wants a large white supply. It is not a sensible XR3774 choice without model-specific confirmation.

For a nearby model’s size question, read bobbin size for Brother XR9550. The XR9550 guide can help you understand what to check, but its answer does not confirm the XR3774’s bobbin type.

StiVerse 210 Pcs Prewound Bobbin Thread Set: Best for color variety

5

StiVerse 210 Pcs Prewound Bobbin Thread Set: Best for color variety

8.7/10Our score

• 210 bobbins total
• 36 assorted colors plus extra white and black
• Size A, Class 15, SA156
• 40/2 spun polyester thread

A broad color assortment in a stated Size A, Class 15, SA156 format. The product is described as unsuitable for machine embroidery.

See it on Amazon

Pros

• 210 bobbins total
• Assorted colors plus extra white and black
• Brother is included in compatibility details

Cons

• Not suitable for machine embroidery
• XR3774 is not named in the compatibility details

StiVerse includes 210 bobbins: 36 colors with five bobbins per color, plus extra white and black. The set is labeled Size A, Class 15, SA156 and uses 40/2 spun polyester thread.

Brother is among the listed compatible brands, but XR3774 is not named. The set is described as unsuitable for machine embroidery, so consider it for ordinary sewing only after confirming the XR3774 bobbin type.

This is the largest assortment here for someone who changes colors often across sewing projects. Skip it if you want machine embroidery bobbins or prefer a smaller box that takes less storage space.

EBOOT 144 Pieces Prewound Bobbins Sewing Thread: Best for medium assortments

6

EBOOT 144 Pieces Prewound Bobbins Sewing Thread: Best for medium assortments

8.5/10Our score

• 144 prewound bobbins
• 24 colors
• Size A, Class 15
• 75D/2 filament polyester thread

A 24-color selection with six bobbins per color, in a stated Size A, Class 15 format. Brother XR models appear in its compatibility details, though XR3774 is not named.

See it on Amazon

Pros

• Six bobbins per color
• Polyester thread type is specified
• Several Brother XR models are named

Cons

• XR3774 is not individually named
• Thread length is not specified

EBOOT has 144 prewound bobbins across 24 colors, with six bobbins per color. It identifies the bobbins as Size A, Class 15 and the thread as 75D/2 filament polyester.

The compatibility details name Brother XR1300, XR9000 and XR9500PRW, among other models, but not XR3774. That makes the model family relevant, though it does not confirm fit for this machine.

Choose EBOOT if you want a middle ground between a small starter set and a very large assortment. Skip it if you need a confirmed XR3774 match or need to know thread length before buying, since that length is not specified.

HimaPro 72 PCs Assorted Color Bobbins: Best for sewing kits

7

HimaPro 72 PCs Assorted Color Bobbins: Best for sewing kits

8.4/10Our score

• 72 prewound bobbins
• 36 assorted colors
• Size A, SA156, Class 15
• Two clear storage cases

A smaller assorted-color set that includes storage cases and sewing accessories. Its size is described as Class 15, but XR3774 isn't named in its compatibility details.

See it on Amazon

Pros

• Two clear bobbin cases
• 36 assorted colors
• Reusable plastic bobbins

Cons

• XR3774 is not named
• Thread weight is not specified

HimaPro provides 72 prewound bobbins in 36 colors and two clear storage cases. The package also includes tape measures, assorted sewing needles and seam rippers, which makes it useful when you need several basic sewing supplies together.

The bobbins are labeled Size A, SA156 or Class 15, and Brother is among the compatible brands. XR3774 is not named, so verify the size in the manual first.

Choose this set if the extras and two cases will get used. Skip it if you only need bobbins or already have sewing tools; compare its color assortment with Outus if you want one bobbin per shade.

Brother SA159 Sewing Machine Bobbins for PQ1500/juki: Best for PQ machines

8

Brother SA159 Sewing Machine Bobbins for PQ1500/juki: Best for PQ machines

8.2/10Our score

• Brother-branded bobbins
• Compatible with Brother PQ1500 and PQ1300
• Also fits listed Juki TL and Janome 1600 models

These Brother bobbins are specified for PQ and other listed machines, not the XR3774. Choose them only if the exact model and bobbin type match your manual.

See it on Amazon

Pros

• Brother-made accessory
• Named model compatibility is specific

Cons

• XR3774 is not listed
• Only five bobbins per pack

Brother SA159 bobbins are specified for the PQ1500, PQ1300 and PQ1500s, as well as named Juki TL and Janome 1600 models. XR3774 is not among the compatible machines, so the Brother brand alone is not enough to establish a fit.

The pack contains five bobbins. Buy it for one of the named models when the manual confirms the SA159 part; skip it for an XR3774 unless its manual explicitly calls for the same bobbin.

Bobbin Case for Brother and Babylock Sewing: Best for PR machines

9

Bobbin Case for Brother and Babylock Sewing: Best for PR machines

7.9/10Our score

• Replacement case for part XC7206001
• Brother PR embroidery models listed
• Babylock embroidery models listed

This is a replacement bobbin case for named Brother PR embroidery models, not a bobbin for the XR3774. Check your machine’s part number before considering it.

See it on Amazon

Pros

• Replacement part number is given
• Named Brother and Babylock models are specified

Cons

• XR3774 is not named
• Not a bobbin or thread set

This is a replacement case for part XC7206001, not a bobbin set. It names Brother PR embroidery machines such as the PR1000, PR1050X, PR600 and PR670E.

XR3774 is not in the compatibility details. Consider this case only when replacing XC7206001 in a listed machine; skip it for routine XR3774 bobbin purchases.

How should you choose bobbins for the Brother XR3774?

Start with the XR3774 manual, then compare its bobbin instructions with the exact type and intended use of a set. A compatibility statement that names Brother generally does not confirm every model.

The products here use several related labels, including Size A, Class 15 and SA156. Those labels are not a substitute for a model check, and one pick uses Size L, SA155 instead.

Next, decide whether you need prewound thread, empty reusable bobbins, one color or a varied assortment. A large pack is useful only if its bobbin type fits and its color mix suits the projects you actually sew.

Are Size A, Class 15 and SA156 interchangeable?

Some products group these terms together, but the XR3774 manual should settle which bobbin to use. Do not assume a shared label confirms a fit when the model is not named.

Material and intended use matter too. A prewound bobbin for embroidery may not be the right choice for every sewing project, and StiVerse specifically describes its set as unsuitable for machine embroidery.

The quilting machine bobbin types guide explains common shapes and terminology. Use it to understand the labels, then confirm the XR3774 requirement separately.

Should you buy prewound or reusable bobbins?

Prewound bobbins save winding time, while reusable bobbins let you wind thread that matches your project. For heavier quilting projects, compare 100/16 and 110/18 quilting needles to match needle size to fabric and thread.

Choose based on the machine instructions, the thread you use and whether a ready-to-use supply matters more than control over color.

Outus says its bobbins can be reused when the thread is gone. Several other choices are also prewound, but none should be used until the type and thread are appropriate for the XR3774.

When winding your own, use the machine’s bobbin winder and follow its threading path. Wind evenly without pulling the thread tight by hand, and stop if the bobbin shifts, catches or winds unevenly.

How do you set up and care for a bobbin?

Start with a compatible bobbin, place it in the orientation shown in the manual, and guide the thread through the marked slot or path. Then reassemble the bobbin area as instructed and test on a fabric scrap before starting a visible seam.

Keep spare bobbins in a case or compartment so lint and loose thread do not collect around them. A clear box, like the ones included with Outus and HimaPro, also helps you pick a shade without handling every bobbin.

Before sewing, check that thread is not crossed, tangled or hanging from the bobbin area. Remove lint with the cleaning method recommended for the machine, and avoid forcing a bobbin or case that does not seat easily.

What mistakes cause bobbin trouble?

The most common buying mistake is choosing by brand name alone. A set may say it fits Brother machines yet omit the XR3774, so match the bobbin type in the manual before ordering.

Another mistake is confusing a bobbin with a bobbin case. The bobbin carries lower thread; the case positions or guides it, and replacement cases require their own model and part-number match.

If stitches bunch or tension changes after a bobbin swap, rethread the upper path and reseat the bobbin before adjusting tension. Change one thing at a time, then sew a short test seam on scrap fabric; avoid turning the case screw unless the manual calls for adjustment.

Which bobbins should XR3774 owners choose?

Choose Outus if you want a visible range of colors in one box, or Simthread if you use white thread often and want the thread weight and length stated. Choose EBOOT for a medium color assortment or HimaPro’s 72-piece set if the storage cases and sewing tools are useful.

Choose StiVerse for a broad sewing assortment, but not machine embroidery. Choose the HimaPro Size L set or Brother SA159 only when the machine manual specifically matches those types, and treat both case products as replacement parts rather than bobbin purchases.

For the best bobbins for Brother XR3774 sewing, verify the required bobbin in the manual first, then choose the color range and thread format that fit your work. If you are diagnosing a case issue, read the Brother XR3774 bobbin case guide before buying a replacement.

Our top 3 picks at a glance

1. 1
   Best for color matching

   Outus Assorted Colors 50 Prewound Bobbins Compatible

   9.5/10 our score

   See it on Amazon
2. 2
   Best for white thread

   Simthread 144pcs Size A SA156 Embroidery Prewound

   9.4/10 our score

   See it on Amazon
3. 3
   Best for XR case checks

   StitchTech XC3152221 Bobbin Case for Brother

   9.2/10 our score

   See it on Amazon

Frequently asked questions

What bobbin size does the Brother XR3774 use?

Check the XR3774 manual for its bobbin type before buying. Several options in this guide are labeled Size A, Class 15 or SA156, but none of these products names the XR3774 specifically.

Those size terms appear together in some product descriptions, yet the model-specific fit still needs confirmation.

Can I use prewound bobbins in a Brother XR3774?

Use prewound bobbins only if their type and thread suit the XR3774 instructions. Some picks here name Brother machines and use Size A, Class 15 or SA156 bobbins, but the XR3774 is not named.

To wind your own, follow the manual or this bobbin winding guide.

Is the bobbin case the same as the bobbin?

No. The bobbin holds the lower thread, while the bobbin case holds or guides the bobbin inside the machine.

A replacement case needs to match the machine’s part number and hook system.

Read our guide to the bobbin case for Brother XR3774 before considering a replacement.

Does bobbin thread type matter?

Yes. Thread weight and material affect how the lower thread works with the upper thread and the project.

Simthread specifies 60 wt polyester, while other choices provide different or unspecified thread details.

For a starter overview, read best bobbin thread for beginners.