Size & Quantity: Each pack contains 2 pieces, each 36" wide and 50" long. Each panel with 6 tabs, total 12 tabs. 13 pieces binder rings included(inner diameter 1.6 inch). Hanging Options: （1)Grommet curtains-suitable for curtains with 6 grommets.（2）rod pocket & back tab curtains-the curtain liner needs to be hung from the other rod of the rod pocket curtain. 100% Blackout: These blackout curtain liners are made of high density materials which are strong and durable. These curtain liners can be used with sheer curtains and light filtering curtains to increase the sense of privacy. Protect Sleep & Privacy: These curtain liners can block out 100% sunlight and street light, reducing the noise, stopping snooping, perfect for afternoon naps, late sleepers, night shifts and street dweller. Machine Washable: Machine wash cold in gentle cycle with like colors. Only non-chlorine bleach when needed. Tumble dry low. Remove promptly. Cool iron as needed.