This is a slip-over label holder I designed to fit an Alexdrawer cabinet. The drawer fronts are 0.66thick (just over 5/8), and the inner tang of the holder is angled inward at 3° to grip from 0.66to 0.61 thickness - they will only work within this size range, unless you tweak the grip width on the STL (feel free). The label holder is sized for using the back of a standard business card 2"H, and a little wider than half a card width. Just slide in a card, and cut to length.