2-compartment rigid card holder with slot and chain holes. Front holds one standard credit card size ID up to 32 mils. Back holds up to 3 credit card size ID cards or 7 standard business cards, up to 90 mils. total thickness. Horizontal or vertical, side loading. This holder is "open" style, i.e. the ID card is not covered by clear plastic. Outside dimensions : Horizontal holder, 2-1/8 x 3-3/8 inches (54 x 86 mm). Vertical Holder, 2-3/8 x 4-1/4 inches (60 x 108 mm). PLEASE ORDER IN MULTIPLES OF 100.