Outer sleeves for 12" vinyl records. Mid-Fit 4mil. polyethylene plastic (above average thickness). 12-3/4" x 12-3/4" (give or take 1/8" on occasion) no flap. Fits good over singles, single LP, gatefolds, and most 2LP ("loose-fit" also now available for bulky jackets). Never sleeve polyethylene tight fitting, it usually shrinks over time. Protects from saucy fingers, dirty hands, shelf wear, impact, and abrasions. Above average thickness conceals minor jacket flaws.