25 Metallic Christmas Mailers, Self-Sealing, 10 x 13" (25 Xmas Metallic 10 x 13") 25 self sealing mailers. Metallized envelopes have self-seal closure with lip. 5 of each color: RED, GREEN, BLUE, SILVER, GOLD Each measure 10" x 13" Dramatically decrease your postage weight with these high durable, low weight mailers. Durable, waterproof 2.8 mil. PERFECT FOR CHRISTMAS SEASON!!