These archival quality sleeves are both acid-free, and anti-static. The sleeves measure 7-1/8" x 7" (181mm x 178mm) and are made of 29# super heavyweight mint green paper. Perfect for cleaning up ones personal collection of written on, stained, and ripped up sleeves - or for replacing on vinyl you're trying to sell! These sleeves provide superior protection for your record collection, and are the perfect size! Protect your investment with sleeves from Square Deal Recordings & Supplies - an industry leader for record supplies since 1972.