How to Space Buttons Evenly
The formula for even button spacing: subtract the top and bottom offsets from the total band length, then divide by the number of spaces between buttons (which is one less than the number of buttons).
For example, a 22-inch button band with 6 buttons, 3/4-inch offset at top and bottom: 22 - 0.75 - 0.75 = 20.5 inches of usable space. Divided by 5 spaces (6 buttons - 1) = 4.1 inches between each button.
Button Count by Garment Type
| Garment | Typical Buttons | Band Length | Approx. Spacing |
|---|---|---|---|
| Cardigan (short) | 5-6 | 18-22" | 3.5-4.5" |
| Cardigan (long) | 7-9 | 24-30" | 3-4" |
| Dress shirt | 7-8 | 26-30" | 3.5-4.5" |
| Coat | 4-6 | 30-40" | 6-8" |
| Vest | 5-6 | 16-20" | 3-4" |
| Polo placket | 2-3 | 6-8" | 2.5-3.5" |
Buttonhole Sizing
The standard rule: buttonhole length = button diameter + 1/8 inch. A 3/4-inch button gets a 7/8-inch buttonhole. For thick or domed buttons, add an extra 1/8 inch.
Always test your buttonhole on a scrap of the same fabric with the same interfacing. Some fabrics stretch after cutting the buttonhole opening, making it too loose. Others (like denim) are so stiff the button barely fits through.
Placement Rules
| Rule | Details |
|---|---|
| Bust button | Place one button at the fullest point of the bust — this prevents gapping |
| Waist button | Place one button at the natural waist for a tailored look |
| Top button | Usually 1/2" to 1" from the neckline edge |
| Bottom button | At least 1/2" from the hem to prevent pulling |
| Orientation | Horizontal buttonholes for knits and stress points; vertical for lightweight wovens |
FAQ
Should I place buttons at the bust and waist first, then space the rest?
Yes — this is the professional approach. Pin buttons at the bust and waist, then evenly divide the remaining buttons in the spaces above and below. The spacing may not be identical in every section, but the garment will hang better than strictly even spacing.
How do I space buttons on a knitted cardigan?
Mark buttonhole positions in rows rather than inches. Count the total rows in your button band, subtract top and bottom rows, divide by the number of spaces. Round to the nearest whole row. Use the stitch calculator to convert inches to rows based on your gauge.
What if my spacing comes out to an awkward fraction?
Small differences (under 1/4 inch) between buttons are invisible on a finished garment. Round to the nearest 1/4 inch and distribute any remainder across the middle buttons where it's least noticeable.
Related Tools
- Knitting Stitch Calculator — convert inches to stitches and rows
- Fabric Yardage Calculator — how much fabric for your project
- Bias Tape Calculator — fabric for bias binding