【DIMENSION】 4x8 inch padded envelopes(usable size-4x7"), with opaque Teal poly film. The bubble envelopes feel nice to the touch and are perfect for labeling and stamping. 【COST-EFFECTIVE BUBBLE MAILERS】The padded envelopes are lightweight and water-resistant. Lower the shipping cost of your business and protect your products on the rainy or snowy day. 【SELF SEALED ENVELOPES】 The adhesive on the fold-over flap is strong enough and goes end-to-end. There's no need reinforcement tape and it doesn't come apart unless you tear it up.