10" (3 mil. thick!) heavy duty plastic innersleeves! [10-1/8" x 10" or 257.18mm x 254mm] High density stabilized polyethylene plastic provides the best possible protection against dust and scratches. These are our finest inner sleeves for records. They do not sweat like low density inner sleeves and stand up inside the jacket. (Fits 10" Records) THESE ARE THE HEAVIEST AND BEST WE'VE SEEN!! These cover the vinyl & slide into the record jacket.