RCS Plastics Knife Display Case 18in Stand Fits Custom Work and Randall Knives The inside dimensions for this item is 3" deep x 4.5" high x 18"long. This case will fit a knife 11" to 17.5" long and up to a 2.5" tall blade. 3/16" thick clear Acrylic for the lid and the base is 3/8" thick black Acrylic All edges are beveled and polished four scratch resistant bumpers on the bottom