Protect and store your ATCs with these top-loading sleeves! Artist Trading Cards (ATCs) are miniature pieces of art that are traded around the world. Artists create, trade and collect art at organized swap events, either in person or online. The only official rule is that the trading card measures 2.5" x 3.5". These sleeves are ideal for protecting your mini artwork. Sleeves measure 3" x 4.5". Made of clear, rigid vinyl. 10/Pkg.