USPS shows you how to send a letter or postcard in the U.S., from choosing an envelope, writing the address, buying and applying stamps, and finding a drop-off location.

Envelope Size Chart & Buyer’s Guide Choosing the right envelope size prevents folds, reduces postage surprises, and makes your mail look more professional. Use the chart below to match common …

The standard #10 envelope is the most widely used business envelope in the United States. With options including Square Flap, Policy, and Commercial flap styles, the #10 has become popular for …

Learn about standard envelope sizes in the US as it is one of the challenging aspects of business communication via mail. Read more.

Learn USPS envelope dimensions, letter size rules, and large envelope limits. Save time and postage costs when mailing letters and business items.

Jul 2, 2025 · This complete guide covers standard envelope printing sizes in inches and provides a detailed size chart for quick reference. You’ll learn which envelope type best matches your mailing …

This guide provides comprehensive envelope size charts with standard envelope dimensions, measurements, and specifications to help you select the right option for your documents and mailings.

When it comes to ordering an envelope, it's important to understand which sizes are standard and most popular. Listed below is a wide range of standard sizes for a variety of different envelope types and …

Apr 19, 2024 · Similar to paper sizes, envelope sizes are standardized globally under ISO 269. This ensures that envelope dimensions are universally recognized and utilized, facilitating international …

Sizes for Letters You probably have a picture in your mind of what a "letter" is. Possibly you're using a standard No. 10 envelope for your letter, so that's easy to picture.