Bobbins: which class fits your machine
The wrong bobbin class is a real and very annoying problem. Check your manual for the class letter before you buy anything here.
5 picks · $7–$20 · prices checked October 8, 2026 · researched from listings, specs and owner feedback, not hands-on testing
Babelshar 36Pcs Prewound Bobbins — $7.69. Priced in the lower half of this category. See why
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Bobbins compared
Priced in the lower half of this category
The least expensive pick in this category, which makes it the low-risk way to find out…
Priced in the lower half of this category
A straightforward option in this category.
The bobbins come prewound, so you can sew the day it arrives.
Scroll sideways for scores, prices and buy links
| Rank | Pick | Best for | StitchScore | Price | Buy |
|---|---|---|---|---|---|
| Editorial #1 | TopBabelshar 36Pcs Prewound Bobbins 4.6 out of 5 stars · 136 ratings | Priced in the lower half of this category | 91 | $7.69 | Buy on Amazon |
| Editorial #2 | Sewphee Class 15 Plastic Bobbins 4.6 out of 5 stars · 1,461 ratings | The least expensive pick in this category, which makes it the low-risk way to find out… | 86 | $6.99 | Buy on Amazon |
| Editorial #3 | New brothread SA156 Prewound Bobbin Thread 4.6 out of 5 stars · 4,894 ratings | Priced in the lower half of this category | 85 | $8.98 | Buy on Amazon |
| Editorial #4 | YEQIN 2 Pieces Bobbin Case | A straightforward option in this category. | 81(early) | $8.99 | Buy on Amazon |
| Editorial #5 | ilauke 210 pcs Class15 Prewound Bobbins 4.6 out of 5 stars · 2,859 ratings | The bobbins come prewound, so you can sew the day it arrives. | 76 | $19.99 | Buy on Amazon |
Scores marked (early)are still settling: the listings don't yet expose a star rating we can read, so owner satisfaction sits at a neutral starting value. How the StitchScore works.
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What goes with Bobbins
The things this shelf usually needs alongside it — one current pick per category, and nothing here is required to start.
ThreadCoats & Clark thread$8.50 4.7 out of 5 stars · 4,705 ratings
Wind the same thread you are sewing with, on the top and below.
Sewing MachinesBrother XM2701$143.14 4.6 out of 5 stars · 19,162 ratings
A first machine — 27 built-in stitches is enough to sew clothes without a menu to decode, and the listing specifies the automatic needle threader and the jam-resistant drop-in top bobbin, which are the two steps beginners most often give up on.
Researched from listings, specs and owner feedback — never hands-on testing. We may earn a commission; it never changes a pick.
Guides that go with Bobbins
Which bobbin class fits your machine
A bobbin's class is its size and shape, not a quality grade, and the wrong one will not sew properly however good it is. The class printed on nearly every pack below is Class 15, which is also sold as size A and, for Brother machines, as the SA156.
Brother's support answer on bobbin type covers a long list of its home sewing and embroidery machines, including every Brother machine on our sewing-machine and quilting shelves. It says they take the SA156, a plastic Class 15 type bobbin, and that metal bobbins should not be used in them. SINGER states that its Heavy Duty 4423 takes SINGER Class 15 transparent bobbins, and its own Class 15 packs tell you to check your machine's manual for the correct size.
Class 15 and L-style bobbins look almost identical and are not the same: Superior Threads, which sells prewound bobbins in both, puts the Class 15 about half a millimetre larger across. Some machines, several SINGER models among them according to Superior, take a bobbin made only for that machine. The reliable source is your manual or your machine maker's support page, not a listing that says it fits most machines.
Which class each pick is
Taken from each listing's own title and feature bullets. A listing's list of compatible brands is the seller's claim, not the machine maker's, so check the class against your manual before you buy.
- Babelshar 36Pcs Prewound Bobbins — Class 15, size A, per the listing. Prewound bobbins in a storage case.
- Sewphee Class 15 Plastic Bobbins — Class 15 per the listing: plastic, flat top and bottom, 20.3 mm across and 11.7 mm tall.
- New brothread SA156 Prewound Bobbin Thread — Size A, Class 15, sold as the SA156 type, per the listing. Prewound in white with plastic sides.
- YEQIN 2 Pieces Bobbin Case — Metal bobbins plus two bobbin cases for front-loading machines. The listing names no class, and Brother says metal bobbins should not go in its SA156 machines, so this pack is only for a machine whose manual calls for metal bobbins.
- ilauke 210 pcs Class15 Prewound Bobbins — Class 15, size A, described as SA156 standard size, per the listing. Prewound in 36 colours.
Frequently asked
- How do I know what size bobbin I need?
- Look in your machine's manual, or search your model on the maker's support site; it names the class or the part number. Brother, for example, publishes a list of its home machines that take the SA156 Class 15 type bobbin. If the manual is gone, take the bobbin that came with the machine to a sewing shop and match it rather than trusting a listing that says it fits most machines.
- Are Class 15 and L bobbins the same?
- No. They look almost identical, but Superior Threads puts the Class 15 about half a millimetre larger in diameter, and they are separate styles. Use the one your manual names. A bobbin that nearly fits is still the wrong bobbin.
- Do all bobbins fit all machines?
- No. Class 15 is now the most common style on home machines, according to Superior Threads, but some machines take a bobbin made only for them, and the bobbin can change between models of the same brand. Material is part of the spec as well: Brother says metal bobbins should not be used in its SA156 machines.
- Are prewound bobbins worth it?
- For many people, yes. Superior Threads says machine-wound bobbins hold much more thread than a bobbin wound at home, so you stop to change them less often. They only help if they are the right class for your machine, and you can still wind your own when you need a colour the pack does not have.
Sources
Prices and availability are the most recent values we pulled from Amazon and refresh on a cycle; confirm the live price before buying. We may earn a commission on a purchase, and it never changes a score. See how we score gear.