First Class Postage Rates 2024 Weight Limit. Length of the item plus twice the diameter must be less than 104cm, with the greatest dimension less than 90cm. Usps first class package service allows you to ship lightweight packages that weigh up to 15.999 ounces.

If you need to send papers or documentation that weighs more than 3.5 ounces, a good. It’s crucial to ensure that your mailings meet the.