As of Nov 2023, four additional categories are now eligible to use eBay standard envelope, expanding the service to eight categories. See the full list of category paths.

• Patches
• Stickers & Decals
• Greeting Cards
• Seeds
• Trading Cards
• Coins & Currency
• Postcards
• Stamps

Things to consider

Flexibility. Shipped envelopes are processed at sorting centers that use machinery with rollers, so envelopes need to be flexible enough to bend accordingly.

Uniform thickness. The maximum thickness allowed is ¼ inch. If your envelope or flat mailer isn’t uniformly thick and/or has bumps or lumps, it may be classified as a package, which could then be returned or subjected to additional postage fees.

Which envelopes qualify? A plain, number 10 envelope works just fine, but it’s not required. You can use any envelope that fits the following specifications:

• No smaller than 3.5” x 5”
• No larger than 6.125” x 11.5”
• No heavier than 3 oz.
• No plastic, strings or closures 
• Recipient address is parallel to envelope’s longest side
• Uniform thickness not greater than .25”

If you need to use a thicker or more rigid envelope to better protect what you’re shipping, check with your local post office to ensure your envelope fits the postage bracket and guidelines.

Need a visual aid? We’ve got you covered.