These envelopes made from .010 Lig-free Type I paper are available to hold standard 33rpm/ 16 inch records. They can be placed in our record boxes (see #17183LF or 17183MC) for additional protection, or may simply hold your collection in a cabinet or on storage shelves. Envelopes measure 17 x 17-1/4 and have 2″ flaps for added protection from dust for albums stored on open shelves. 25 envelopes are in each package. As albums become more valuable, protecting their covers from harmful effects of light and dust becomes increasingly important.