Cushion Size Reference
A practical reference for cushion size reference with context for choosing a starting value rather than treating conventions as fixed rules.
How to use this chart
Find the row closest to your material or intended size, then confirm it against the pattern, manufacturer guidance or a measured sample. Keep units consistent.
| Insert | Common finished cover | Cut note |
|---|---|---|
| 16 in | 15½–16 in | Add seam allowance |
| 18 in | 17½–18 in | Add seam allowance |
| 20 in | 19½–20 in | Add seam allowance |
Useful context
Published conventions differ by region, manufacturer and intended ease. Use the table as a starting reference and record the actual result from your own material.