UNI-K self-seal Insulated Bag Metallic Foil Mailers 9" W x 11.8" H / 50 counts Contains 50 counts of 9" W x 11.8" H(9.8" W includes sealing) strong insulated mailers. Excellent for selling expiring products - Cosmetics, Foods, etc. Specail embossed cover, side pressed sealing, metallic foil surface enhance the insulting effects. Hot-melt method adhesive for extra strong adhesion. perfect item for both indoor and outdoor use.