These resealable premium 2.5 mil thick archival quality crystal clear sleeves are a great choice for protecting your precious record collection, and they are the thickest BOPP sleeves on the market! 25% Thicker than our standard 2 mil resealable sleeve. Each sleeve measures 12-3/4” wide (opening) x 12-3/8” tall + 1-1/2” flap – perfectly sized for single, double and gatefold records! The special adhesive used on this sleeve allows you to open & reseal the record many times, keeping your vinyl safe and dust-free. Biaxially Oriented Polypropylene (BOPP) means a much better sleeve clarity than the traditional cast polypropylene or polyethylene. The resealable adhesive strip is located on the body of the bag, allowing for easy record insertion & removal.