First class mail rates large envelope

The rates for First-Class Mail large envelopes, also known as flats, vary depending on the weight and size of the envelope. Here are the current rates for First-Class Mail large envelopes:

Weight and Size

• Large Envelope (also known as a Flat): 12 1/2 x 15 1/2 inches or larger, but not exceeding 13 inches in height, 22 inches in length, or 3/4 inch in thickness.

Rates

• Weight: Up to 1 oz (28.35 grams)
  • Domestic: $3.50
  • International: $1.20 (to Canada), $1.30 (to Mexico), $1.40 (to other countries)
• Weight: 1 oz to 2 oz (28.35-57.7 grams)
  • Domestic: $3.75
  • International: $1.45 (to Canada), $1.55 (to Mexico), $1.65 (to other countries)
• Weight: 2 oz to 3 oz (57.7-85.05 grams)
  • Domestic: $4.00
  • International: $1.70 (to Canada), $1.80 (to Mexico), $1.90 (to other countries)
• Weight: 3 oz to 4 oz (85.05-113.4 grams)
  • Domestic: $4.25
  • International: $1.95 (to Canada), $2.05 (to Mexico), $2.15 (to other countries)
• Weight: 4 oz to 6 oz (113.4-170.1 grams)
  • Domestic: $4.50
  • International: $2.20 (to Canada), $2.30 (to Mexico), $2.40 (to other countries)

Additional Fees

• Extra services, such as tracking, insurance, or certified mail, may incur additional fees.
• International rates may vary depending on the destination country and any applicable customs fees.

Please note that these rates are subject to change, so it's always a good idea to check the official USPS website or consult with a postal representative for the most up-to-date information.