What a quarter inch foot does for piecing
- Most quilt seams use a quarter-inch seam allowance. A quarter inch foot makes that easier to hit: you line the raw edge of the fabric up with the foot's edge, and the needle sits about a quarter inch from that edge.[1][2]
- Some versions add a guide. A guide on the side of the foot is meant to ride against the seam, which keeps the allowance from growing too wide. BERNINA's Patchwork Foot with Guide #57/57D adds a guide to the right side of the foot used on the #37/37D.[2][6]
- Many feet are marked to help with stopping and turning. Most manufacturers add markings or notches, usually spaced a quarter inch apart, according to The Seasoned Homemaker.[6]
- Baby Lock's quarter-inch Quilting or Patchwork Foot, model BLSO-QF, is also used for quarter inch topstitching, and its locking pin is described as letting the foot sew over uneven fabric layers.[4]
- Fit depends on the machine and shank. The foot should be made for your machine, and the product code is listed in your manual.[1][3]
How the foot sets a consistent seam
Consistent seams matter because blocks have to match when they are joined. The Seasoned Homemaker gives the example of a twelve-inch square finished block made from several pieces: if the seam allowances are inaccurate, the block can end up more than half an inch off.[6]
A foot with an edge reference keeps the fabric edge against the foot, so the seam width follows the foot. A guided foot lets the guide do that job. BERNINA says its Patchwork Foot #57/57D guide is a strong visual cue, so you can stitch faster and still keep consistent quarter inch seam allowances.[2][6]
A guide needs care. Beth Ann Williams, writing about several quarter inch feet on bethannwilliams.com, says that guide blades can be very helpful, but a thin metal guide that gets bent can leave the seam allowance no longer exact, and that the foot without a guide blade is the one used most often.[3]
BERNINA Patchwork Foot #97/97D works differently. BERNINA says the #97/97D is wider at the back to fit the larger feed teeth of its wide-stitch models, and its adjustable guide attaches to the machine bed. For a quarter-inch seam with the BERNINA Patchwork Foot #97/97D, the fabric aligns with the outer edge of the right toe; on the left toe, it aligns with the inside of the toe.[2]
Comparing the feet by brand
| Attribute | Baby Lock 1/4 inch Quilting Foot (BLSO-QF) | BERNINA Patchwork Foot #37/37D | BERNINA Patchwork Foot with Guide #57/57D | BERNINA Patchwork Foot #97/97D | Brother SA185 1/4 inch Piecing Foot with Guide |
|---|---|---|---|---|---|
| Maker's stated use[2][4][5] | Exact 1/4 inch seams for piecing, plus quarter inch topstitching | Simple quarter inch piecing and seaming, and quarter inch tucks | Piecing long strips and parallel straight rows spaced a quarter inch apart | Precision stitching on BERNINA's wide-stitch models | Centered straight stitching of quarter inch seams on fine fabrics, according to Brother |
| Product code[2][4][7][8] | BLSO-QF | #37/37D | #57/57D | #97/97D | SA185 / F057 |
| Guide[2][4][5] | Not described on the product page | No guide; the #57 is this foot with a guide added | Guide added to the right side | Adjustable guide attaches to the machine bed | Guide on the foot, with reference marking on 3 sides |
| How the seam is set[2][4][5] | Product page describes an exact 1/4 inch seam; the locking pin helps over uneven layers | Align the fabric edge with either side of the foot; the needle stitches 1/4 inch away | Same side-edge method as the #37/37D | Outer edge of the right toe for a quarter-inch seam; inside of the left toe for the left side | Brother lists reference markings on 3 sides of the foot |
| Machines it is listed for[2][4][5][7][8] | Not named on the product page; check the manual | Not named in the source; check the manual | Not named in the source; check the manual | BERNINA's wide-stitch models; check the manual | Brother's product page lists XR3774; the CS7000X and XR3774 support pages both list it |
| Works for[2][4][5][7][8] | Baby Lock machines | BERNINA machines | BERNINA machines | BERNINA machines | Brother machines |
How to check your seam allowance
- Look up the foot's product code in your machine's manual and confirm the foot is made for your machine and shank. Check the product description before buying, because brand-specific feet may not fit other brands.[1][3]
- Set the machine to a straight stitch in the center needle position. BERNINA says its patchwork feet are designed for that setting, and a straight stitch plate gives more support as the needle goes through the fabric.[2]
- Line the raw edge of the fabric up with the reference edge of the foot. For BERNINA Patchwork Foot #97/97D, use the outer edge of the right toe, or the inside of the left toe for the left side.[1][2]
- Sew a test strip from two scrap pieces cut to the width your pattern uses. Keep the raw edge against the foot's reference edge the whole way.
- Press the seam, then measure the sewn unit. A block built with correct seam allowances should match the size the pattern gives, because mismatched seams cause blocks to be off in size.[6]
- If the seam is off, check the guide on a foot that has one for bending, as Beth Ann Williams advises, then adjust your guiding edge and sew another test strip. Follow your machine's manual for any needle position adjustment.[3]
Questions readers ask
Can I piece a quilt without a quarter inch foot?
Yes. Threads Monthly says a beginner can try a simple quilt with the standard presser foot, but needs to be extra careful that the seam allowance stays at a quarter inch.[1][3]
Is a quarter inch foot the same as a walking foot for quilting?
No. A quarter inch foot helps with piecing accurate quarter-inch seams, while a walking foot has feed dogs that move the top and bottom layers together to reduce shifting and puckering when quilting.[1]
Will a BERNINA foot fit a Baby Lock or Brother machine?
Not as a rule. BERNINA's patchwork feet are described for BERNINA machines, Baby Lock's foot is sold for Baby Lock, and Brother's SA185 is listed on Brother pages for Brother machines. Check your manual or the machine list on the product page before buying.[1][2][4][5]
What if my foot has no guide?
Line the edge of the fabric up with the edge of the foot. That is the method BERNINA gives for its Patchwork Foot #37/37D, which has no guide.[1]
What we could not confirm
- The Baby Lock 1/4 inch Quilting or Patchwork Foot product page does not say which machines it fits, so check the manual before buying.
- The BERNINA source says three of its patchwork feet work with Dual Feed models but does not name which three, so check your machine's manual.
- Brother's SA185 product page lists XR3774 among its machines but does not list CS7000X, while Brother's CS7000X support page lists the SA185 / F057 foot. Check the manual or the Brother support page for your model.
- None of the sources defines a scant quarter inch, so this page does not give one; check your pattern's instructions.
- No source compares how accurately each foot sews on different machines, so measure your own test strip.
Sources
- 4 Sewing Machine Feet for Quilting – a Beginners Guide — checked 2026-10-27
- BERNINA Patchwork Feet #37/37D, #57/57D and #97/97D — WeAllSew (BERNINA) — checked 2026-10-27
- My Top 5 Specialty Presser Feet for Quilters – Beth Ann Williams — checked 2026-10-27
- 1/4" Quilting Foot — checked 2026-10-27
- SA185 1/4" Piecing Foot - Guide | Brother — checked 2026-10-27
- The Seasoned Homemaker — the patchwork presser foot — checked 2026-10-27
- Brother CS7000X — optional quilting feet (Brother support) — checked 2026-10-27
- Brother XR3774 — optional quilting feet (Brother support) — checked 2026-10-27