50 Glamour Silver Bright and Shiny Metallic Exterior Padded Bubble Mailers Envelopes Self Sealing Bags 13.75x11 Usable Dimensions: 12.75 x 10.75. Color: Silver, Paper Liner: White. Provides excellent protection during shipments. Aluminum Foil with Bubble Lining, Bubble Lining: 3/16. Approved by UPS, FedEx, and USPS.