#000 4x8 Bubble Mailers | Usable Size 4x7"

Usually, yes. “#000” is commonly the size label used for 4" x 8" padded/bubble mailers. That said, size numbers are not perfectly standardized across sellers, so the safest move is to confirm the listed dimensions.

Most of the time, 4x8 refers to the outside dimensions (often measured to the edge of the flap/lip), not the usable interior.

Typically about 4" x 7" usable inside.

Small, low-profile items, for example:

• Jewelry and small accessories
• USB drives, small cables/adapters, small electronic parts
• Coins/collectibles (ideally in a protective sleeve), trading cards (one-touch/toploader fits only if thickness stays low)
• Small cosmetics like a lipstick or sample-size products

A typical poly 4x8 is often around a quarter ounce (roughly 0.2 to 0.3 oz per mailer).

In most real-world cases, USPS treats a bubble mailer as a package (parcel), not a letter, because it’s padded, often not uniformly flat, and can be too rigid or too thick for letter automation. USPS guidance also notes that rigid pieces are treated as packages, and letters that are uneven/rigid fall into nonmachinable or parcel handling.

If you're located in California, JiaroPack offers self-pickup at 14955 Limonite Ave, Jurupa Valley, CA 92880.