Size #0000 4 x 7 SMALL ~ 50 Kraft Bubble Cushion Self-Seal Padded Envelope Mailers ~ AirPrime DESIGNED IN USA: Golden Kraft Bubble Mailer. Outside Size: 4" x 7" Usable Size: 3.25" x 6", 50-pack box LIGHT WEIGHT CUSHION MAILERS: The padded envelopes are very light, it can provide outstanding low cost shipping protection for a wide range of products. DURABLE: The surface of the bubble envelopes are made from a durable, kraft paper material that will ensure protection during transit. The interior is built with a bubble lined wall construction for extra protection during transit, ensuring the packages arrive in excellent condition. TIGHT SEAL: The self-seal closure provides a reliable, tamper-evident tight seal to secure all enclosures. Extra smooth surface is perfect for handwriting, labeling and stamping. SHIPPERS APPROVED: Approved to use with major carriers - USPS, UPS, FedEx, DHL and more.