This Sizzix Masking Film allows you to keep certain areas of your make clean and clear ahead of applying mixed media to the top. It can be cut with Sizzix Wafer-Thin and Steel-Rule dies and is transparent to assist with aligning where you want to mask off. These 8 1/4" x 11 3/4" (A4) sheets are ultra-thin and have a delicate tack which leaves no visible residue and peels off easily without tearing makes.