Issued as an added insert to 1961 Topps wax packs these 1-3/8" x 1-7/8" stamps were designed to be collected and placed in an album which could be bought for an additional 10 cents. Packs of cards contained two stamps. There are 208 stamps in a complete set which depict 207 different players (Al Kaline appears twice). There are 104 players on brown stamps and 104 on green. While there are many Hall of Famers on the stamps, prices remain low becaue there is relatively little interest in what is a non-card set - 2007 Standard Catalog of Baseball Cards, 16th Edition.