Keego 100% Blackout PVC Light Blockers for Window Shades and Blinds - Block L...
Just cut them with sturdy kitchen scissors or a hacksaw. Standard size: 58.5" x 1.2" x 0.9". Made of light absorbing PVC plastic material. Manufacturer: Keego. EASY TO USEJust peel the sticky backing and stick to the side of your window.