12 x 16" Print & Poster 'L' Sleeves
4 mil ARCHIVAL POLYESTER
12-1/4 x 16-1/4 (outside dimensions).
These L-Seal Envelopes are made from crystal-clear archival Polyester, approved by the Library of Congress. Their rigidity (4 mil) and unique construction (two adjacent sealed sides) allows for quick/safe insertion and removal of photos/prints.