The size of most credit cards is 3 3⁄8 × 2 1⁄8 in (85.60 × 53.98 mm), conforming to the ISO/IEC 7810 ID-1 standard. Credit cards have a printed or embossed bank card number complying with the ISO/IEC 7812 numbering standard. Both of these standards are maintained and further developed by ISO/IEC JTC 1/SC 17/WG 1. Before magnetic stripe readers came into widespread use, plastic credit cards issued by many department stores were produced on stock ("Princess" or "CR-50") slightly longer and narrower than 7810.