Compatible with Rolls and FanFold (Stack) Labels; works with thermal printers and many other desktop label printers. Use this label holder to keep all the labels always aligned, making printing multiple sheets easier & smoother. Maximum roll diameter is 7 inches. Fanfold Labels Maximum size is 7x 4.3 inches. Ideal for 4? X 6? shipping labels and FBA labels and other different-size label paper. Compact and lightweight, the size of the Label holder is 7.8 x 5 x 6 inches. Included is an assembly guide, the thermal label holder is easy to assemble in seconds.