1. Size: A4,F/C,A5,B5,Letter 2. Thickness: 0.03mm,0.035mm,0.04mm,0.045mm,0.05mm,0.06mm,etc 3. Colors of binding edge available Sheet Protector:1. Holes: 11,16,23,26,30,37,etc2. Colors available:Transparent pocket with transparent edgeTransparent pocket with color edgeColor pocket with color edge