it is not recommended to use it on unstable wallsavoid causing the surface of the wall to fall off.Size: length 10 feet ,width 30mm(1.18in) ,thickness 2mm(0.078in).This double-sided tape will stick to almost anything with a smooth surface and is easy to remove without damaging the surface, so you can stick anything anywhere.Use it to fix or paste items such as pictures, a car phone holder, wall stickers, hooks, sticky pads, and phone cases. This sticky transparent tape can be used in the office or at home and brings great convenience to your life