HOW TO SIZE YOUR PILLOW INSERTS – Boho Pillow
2018-7-3 · The longer the measurement, the more you’ll want to size up on it to provide the best overall fill! Small Square (17”x17” and smaller): Size up 1” for your insert size. For a 17'x17' size cover, use an 18'x18' insert. Medium Square (18”x18”-20”x20”): Size up 2” for your insert size. For an 18'x18' size cover, use a 20'x20' insert.
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