If you look closely at the photos, you can see that one set is made flat, pockets not enlarged. The other set has added material to form a pocket that stands proud of the seat leather. So it looks like you can add some material, and if it's not enough, it will stretch to fit. You can use some scrap and build a corner to test it. You can also wet form the pocket to fit the way you want. One reason for going with a flat pocket is it will roll up in a neater bundle for transport and storage.