These are BRAND NEW 12" (2 mil. thick) premium plastic outer sleeves! [12-3/4" x 12-1/2" or 324mm x 317mm] These archival quality crystal clear sleeves are a great choice for protecting your precious record collection. Biaxially Oriented Polypropylene (BOPP) means a much better sleeve clarity than the traditional cast polypropylene or polyethylene. The 12-1/2" height is ideal for record storage - no excessive material hanging off the top! Archival Quality and Anti-Static BOPP Acid-Free Fits Single, Double, & Gatefold 12" Records Crystal Clear Clarity Premium 2mil Thick Flush Cut with Lip for Easier Insertion