Mailing envelopes 9x12

A common question!

The dimensions of a standard #10 envelope, which is commonly used for mailing letters and documents, are 4 1/8 inches (10.5 cm) long and 9 1/2 inches (24.1 cm) wide. This is often referred to as a "9x12" envelope, although technically it's 9 1/2 x 4 1/8 inches.

Here are some key points to keep in mind when using 9x12 envelopes:

  1. Size: As mentioned, the standard size is 9 1/2 x 4 1/8 inches.
  2. Weight: These envelopes are designed to hold standard letter-sized documents, such as 8 1/2 x 11 inch papers, and can hold up to 1/4 inch (6 mm) of thickness.
  3. Sealing: The envelopes typically have a gummed flap that can be sealed with a moistened finger or a postage stamp.
  4. Postage: The cost of postage for a 9x12 envelope depends on the weight and destination of the mailpiece. You can check the current postage rates on the USPS website.
  5. Usage: These envelopes are commonly used for mailing letters, documents, and small packages, such as:
    • Letters and documents
    • Small packages (e.g., CDs, DVDs, books)
    • Catalogs and brochures
    • Marketing materials (e.g., flyers, postcards)

Remember to always check the USPS website for the most up-to-date information on mailing requirements, including envelope sizes, postage rates, and delivery times.