Basics B contains 4 dies. There are insert dies for buttons (you sew on the buttons), pretties and things to which you can wrap washi tape, ribbons or baker's twine. The other two dies cut blank inserts, one has rounded corners, the other square corners.
The dies speed up the process of making inserts, not having to measure or cut them out with a trimmer or scissors.
The dies produce cut-outs measuring 2 1/2" x 3 1/2" .