A safe place to store three dimensional memories. Acid and PVC free archival safe and great for locks from that first hair cut theater tickers form that night to remember awards and more. Adhesive on the back of the pockets make placement on scrapbook pages clean and easy. Flap folds over like an envelope and temporary glue holds it shut until you want it open. Approximate sizes when closed are Small 2×2 Medium 4x 2-1/2 Large 4-1/4x 3-3/4.