If your bubble mailer is considered an envelope and weighs 1 ounce or less, you can slap a $0.55 forever stamp on your mailer and drop it off at your post office as usual. If your bubble mailer is considered a package, you'll choose between USPS First Class, USPS Retail Ground, Priority Mail and Media Mail.

Do you need a shipping label for a bubble mailer?

To prepare a bubble mailer for shipment, you need a shipping label, a return address label and forms for any additional services. When using a shipping service for metered postage, such as Stamps.com, Pitney Bowes or Endicia, these elements are built into the label.

Can you ship Bubble mailers with USPS?

USPS will only accept bubble mailers as packages if their total thickness is 3/4 of an inch or more. This applies not when the bubble mailer is empty, but when the contents of your shipment are inside. ... One of the most popular ways to ship bubble mailers like these is USPS First Class Package Service.