Originally Posted by
tallchick
I recently replaced all my pillow inserts on my couch, my pillow cases measured 20 in square and I used a 24 in insert and they are nice and full. If I had gotten the same size or smaller I would have been disappointed with the outcome. Can you make a mock up and see how you like the fullness???
That's what I would do. Just take some old fabric even an old bed sheet and make up a sample to see how it fits. I've done that often. It allows you to tweak it a bit it necesary.