Pinit POLYESTER (Mylar) Sleeves. 4-1/4 x 5-1/4". 4 mil. NO flap. Use for 4 x 5" Photos. Indefinite storage. SKU: S4X5 (0)No Reviews yet Add to Shopping Cart Details 4 x 5" Standard Photo Sleeve 4 mil ARCHIVAL POLYESTER 4-1/4 x 5-1/8" (inside dimensions) 4-5/16 x 5-3/16" (outside dimensions) These museum grade po... Details Back Details4 x 5" Standard Photo Sleeve 4 mil ARCHIVAL POLYESTER 4-1/4 x 5-1/8" (inside dimensions) 4-5/16 x 5-3/16" (outside dimensions) These museum grade polyester sleeves are archival, crystal clear and approved by the Library of Congress for indefinite storage (hundreds of years). Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review