This die is a BOB - Block on Board. Block on Board dies contain all the shapes you need to create a quilt block with a single die. Now you don't even have to think about what shapes are needed to make a block, just cut and GO! Designed to cut folded fabric right off the bolt - up to 6 layers at a time. It makes 8" finished blocks. Designed to work with the GO! Baby, GO! and GO! Big Fabric Cutters.