Priority mail flat rate box sizes & rates

Here are the current Priority Mail Flat Rate box sizes and rates from the United States Postal Service (USPS):

Small Flat Rate Box

• Dimensions: 5-1/2" x 8-1/2" x 1-1/2"
• Weight limit: 70 lbs
• Rate: $7.95 (domestic), $24.95 (international)

Medium Flat Rate Box

• Dimensions: 11" x 13-1/2" x 2-1/2"
• Weight limit: 70 lbs
• Rate: $14.35 (domestic), $34.95 (international)

Large Flat Rate Box

• Dimensions: 12" x 12" x 5-1/2"
• Weight limit: 70 lbs
• Rate: $19.95 (domestic), $44.95 (international)

Regional Rate Box

• Dimensions: 13-1/2" x 13-1/2" x 5-1/2"
• Weight limit: 20 lbs
• Rate: $13.15 (domestic, to zones 1-4), $15.15 (domestic, to zones 5-8), $17.15 (domestic, to zones 9-10)

APO/FPO Flat Rate Box

• Dimensions: 12" x 12" x 2-1/2"
• Weight limit: 70 lbs
• Rate: $12.95 (domestic), $24.95 (international)

Note:

• These rates are subject to change, so it's always best to check the USPS website for the most up-to-date information.
• The weight limit for each box is the maximum weight that can be shipped in the box. If your package weighs more than the limit, you'll need to use a larger box or a different shipping service.
• The Regional Rate Box is only available for shipping within the contiguous United States and does not include Alaska, Hawaii, or Puerto Rico.
• The APO/FPO Flat Rate Box is only available for shipping to military addresses in the United States and abroad.