Stamp Glassine #3 Envelope. 4-1/4 x 2-1/2". Transparent 30 lb. virgin glassine. No gum on the flap.

Glassine # 3 Envelope. 4-1/4 x 2-1/2". Made from transparent, 30 lb, virgin glassine. Strong outside-sealed seams are glued with anti-tarnish adhesive...