Standard size mailing envelope
A standard size mailing envelope in the United States is typically one of the following sizes:
- #10 Envelope: 4 1/8 inches wide x 9 1/2 inches long (10.5 cm x 24.1 cm) This is the most common size for business correspondence and is suitable for documents up to 1/4 inch thick.
- #9 Envelope: 3 7/8 inches wide x 8 3/4 inches long (9.8 cm x 22.2 cm) This size is slightly smaller than the #10 envelope and is often used for smaller documents or for mailing to international destinations.
- Briar Envelope: 4 1/4 inches wide x 9 5/8 inches long (10.8 cm x 24.5 cm) This size is similar to the #10 envelope but is slightly taller and wider. It's often used for documents that are slightly thicker than usual.
These sizes are commonly used for standard business correspondence, such as letters, invoices, and statements. However, it's always a good idea to check with the recipient or the postal service to ensure the envelope size is suitable for your specific mailing needs.