13.75" x 11" Red Metallic Bubble Mailers Padded Self Seal Mailing Envelopes Pack of 50 Usable Dimensions: 12.75 x 10.75. Color: Red, Paper Liner: White. Provides excellent protection during shipments. Aluminum Foil with Bubble Lining, Bubble Lining: 3/16. Approved by UPS, FedEx, and USPS.