Document Holder &ndash; European First Day Cover &ndash; Pkg 250 (5 3/8 x 8) The Choice of Professional dealers as well as astute collectors! Made from high quality 7 Mil semi-rigid non PVC vinyl! High clarity and designed for safe, long-term storage! Outside dimensions are 5 3/8 x 8! Each sleeve holds a European First Day Cover, document, or other collectible item!