These 12" heavyweight paper inner sleeves are the perfect fit for 12" Records! The paper used to make these is certified by the Sustainable Forestry Initiative, and made with 30% post consumer waste. These sleeves are archival quality: acid free, and alkaline free! The sleeves measure 12-1/8" x 12" (307.97mm x 304.8mm) and feature rounded corners for easier removal and insertion, and a hole to view the record label. 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! Proudly made in the USA.