Us post office priority mail envelope sizes

The United States Postal Service (USPS) offers a variety of Priority Mail envelope sizes to fit different types of packages and mailings. Here are the standard Priority Mail envelope sizes:

Small Flats

• Size: 6 1/8" x 3 5/8" x 1/2"
• Weight limit: 1 oz
• Cost: $7.95 (as of 2022)

Medium Flats

• Size: 9 1/2" x 6 1/8" x 1/2"
• Weight limit: 3 oz
• Cost: $13.95 (as of 2022)

Large Flats

• Size: 12 1/4" x 9 1/2" x 1/2"
• Weight limit: 6 oz
• Cost: $19.95 (as of 2022)

Regional Rate Boxes

• Size: 12 1/4" x 9 1/2" x 5 1/2" (A)
• Weight limit: 20 lbs
• Cost: $14.35 (as of 2022)
• Size: 13 5/8" x 12 1/4" x 2 3/4" (B)
• Weight limit: 15 lbs
• Cost: $17.35 (as of 2022)

Priority Mail Padded Envelopes

• Size: 9 1/2" x 12 1/2" x 1/2"
• Weight limit: 70 lbs
• Cost: $14.95 (as of 2022)

Priority Mail Tyvek Envelopes

• Size: 9 1/2" x 12 1/2" x 1/2"
• Weight limit: 70 lbs
• Cost: $15.95 (as of 2022)

Please note that prices and sizes are subject to change, so it's always best to check with the USPS website or a local post office for the most up-to-date information.