25 pieces included. Metallic bubble envelopes / Metallic bubble mailers / Padded mailers Size: 7"x10" inches inside measure. Fashion Pattern Designed poly film outside. Cost effective - The padded envelopes are lightweight & waterproof, shockproof, dustproof, tearproof & durable. SELF SEALED ENVELOPES - The self-seal closure provides a reliable, tamper-evident tight seal to secure all enclosures. See my shipping supplies: poly mailers / thank you stickers / thank you cards & much more! :)