Priority mailing boxes sizes

Priority Mail boxes from the United States Postal Service (USPS) come in a variety of sizes to accommodate different package dimensions and weights. Here are the standard sizes and dimensions for Priority Mail boxes:

Small Flat Rate Box

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

Medium Flat Rate Box

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

Large Flat Rate Box

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

Regional Rate Box A

• Dimensions: 12-1/2" x 15-1/2" x 3-1/2"
• Weight limit: 15 lbs
• Cost: $12.35 (regional rates apply)

Regional Rate Box B

• Dimensions: 13-1/2" x 17-1/2" x 3-1/2"
• Weight limit: 20 lbs
• Cost: $15.35 (regional rates apply)

Priority Mail Express Box

• Dimensions: 12" x 12" x 5-1/2"
• Weight limit: 70 lbs
• Cost: $26.35 (domestic), $53.95 (international)

Priority Mail Express Regional Rate Box

• Dimensions: 12-1/2" x 15-1/2" x 3-1/2"
• Weight limit: 15 lbs
• Cost: $24.35 (regional rates apply)

Please note that these sizes and weights are subject to change, and you should always check the USPS website for the most up-to-date information. Additionally, you can use the USPS's online tool to determine the best box size and cost for your specific package.