Etekcity 300 pcs Premium Mailing Envelopes Combo Pack: 100pcs PM1 6&rdquo; x 9&rdquo;, 100pcs PM4 10&rdquo; x 13&rdquo;, and 100pcs PM5 12&rdquo; x 15.5&rdquo; Self-Sealing White Poly Mailers/Mailing Shipping Envelopes/Bags Combo pack of 300 poly mailing envelopes 100 envelopes each of PM1 6 x 9, PM4 10 x 13, and PM5 12 x 15.5 Self-sealing adhesive for quick and easy packing of items White outer with privacy lining Non-padded yet durable for minimal weight and volume