Ideal for storing your collections of Large Bank Notes , Presentation Packs , First Day Covers , Letters , Large Postcards , Trading Cards , Banknotes and other documents measuring up to 8 1/4" x 5 1/2 "(approx 215 mm x 145 mm). Each wallet is divided into 2 sections , top opening , with 11 holes punched in left hand margin to suit different styles of Ring Binder Albums. Suitable to insert into a standard 2 ring binder album , our 3 Ring Banknote Album , 3 Ring First Day Cover Album , or 4 Ring Postcard Album