Sold by each. Light weight water resistant 8.5" x 12" mailer. Save enough postage to nearly pay for the bag. Outstanding protection for semi-fragile items with 3/16" layer of bubble cushioning. Lining protects against moisture and punctures, and facilitates smooth product insertion. Seamless bottom construction. Convenient self-sealing closure. 100 qty per case. Sizes listed are outside dimensions. Made in the USA.