Pillow measures 13” square. I don’t think pre-made pillow forms come in 13” square size, so pillow form will probably have to be hand made (or you could center crochet piece on a larger pillow and sew it on). Published pattern mistakenly listed size 10 thread when 13” model in photo was stitched with size 20 thread! Gauge is also listed incorrectly in pattern. It should be 7 mesh and 9 rows = 2”.