They hold anywhere from 10-20 ATC's depending on if you do front to back and how much bulky embellishing they have on them. Each book comes blank and ready for your creations! It has chipboard covers, front and back with 10 double sided plastic pockets inside for your ATC's. It's bound and ready to fuss up. At a mere $2.99 how can you pass these up?? Get one now! Heck, take two and get 1 free!