To achieve complete blackout, there must be no gaps where light could enter. Using hook and loop Brand self-adhesive strips around the window frame, this blackout blind attaches to the window and leaves no gaps. Easy to use - simply apply and remove whenever required. Folds up for storage. Can be cut to size, and does not fray so no hemming is required. Full instructions are included, and the hook and loop Brand self-adhesive strips are removable. This Small size is suitable for windows up to 1m x 1.45m, and can be used either way around.