Do Electronic Stamps Have a Size or Weight Limit?

When you use electronic postage, the only size or weight limits are those that the U.S. Postal Service imposes. Currently, the Postal Service will not handle any packages that weigh more than 70 pounds or are larger than a combined width and girth of 130 inches.

Even for overseas mailings that include insurance or other special services, the maximum postage that you'll pay for items this size is considerably less than the maximum amount of postage you can keep in your online account at any time.