First Class Postage Rates 2024 Large Envelope

First Class Postage Rates 2024 Large Envelope. Find out the current prices, size and weight requirements, and extra services. Learn how usps postage rates for flats and letter sizes increased in 2024 due to inflation and operational expenses.

Find out the latest usps rate changes for mailing and shipping services, effective july and september 2024. Our uk size guide is below.