The Card Saver 2 is for standard size trading/sports cards. It measures 3" x 4" plus the 1/2" lip. This product has set the standard for semi-rigid card holders since it's introduction in 1989 (yes, more than 31 years!). The Card Saver II is slightly smaller than the Card Saver 1 (Card Saver 1 is used by PSA and PSA Dealers). Our clarity, material, and manufacturing quality is unsurpassed in the industry.