25 ULTRA THIN 5.2mm Clear CD Jewel Boxes with Built In Frosted Clear Tray #CDBR52 - HALF THE THICKNESS OF A NORMAL CD JEWEL BOX! ULTRA THIN! These are 5.2mm - half the size of a standard jewel box! Built In Tray - No Need To Purchase Trays Seperately These jewel boxes are 5-9/16" x 4-7/8" and ~0.21" (5.2mm) thick.