Us post office mailing boxes sizes

The United States Postal Service (USPS) offers a variety of mailing box sizes to fit different package dimensions and weights. Here are some common USPS mailing box sizes:

Small Flat Rate Boxes

• Small Flat Rate Box: 5-1/2" x 8-1/2" x 1-1/2" (13.97 cm x 21.59 cm x 3.81 cm)
• Weight limit: 70 lbs (31.75 kg)

Medium Flat Rate Boxes

• Medium Flat Rate Box: 11" x 13-1/2" x 2-1/2" (27.94 cm x 34.29 cm x 6.35 cm)
• Weight limit: 70 lbs (31.75 kg)

Large Flat Rate Boxes

• Large Flat Rate Box: 12" x 12" x 5-1/2" (30.48 cm x 30.48 cm x 13.97 cm)
• Weight limit: 70 lbs (31.75 kg)

Regional Rate Boxes

• Regional Rate Box A: 12-1/2" x 12-1/2" x 2-1/2" (31.75 cm x 31.75 cm x 6.35 cm)
• Weight limit: 20 lbs (9.07 kg)
• Regional Rate Box B: 13-1/2" x 13-1/2" x 3-1/2" (34.29 cm x 34.29 cm x 8.89 cm)
• Weight limit: 20 lbs (9.07 kg)
• Regional Rate Box C: 15-1/2" x 15-1/2" x 4-1/2" (39.37 cm x 39.37 cm x 11.43 cm)
• Weight limit: 20 lbs (9.07 kg)

Priority Mail Boxes

• Priority Mail Small Box: 6-1/2" x 11-1/2" x 2-1/2" (16.51 cm x 29.21 cm x 6.35 cm)
• Weight limit: 70 lbs (31.75 kg)
• Priority Mail Medium Box: 11-1/2" x 13-1/2" x 2-1/2" (29.21 cm x 34.29 cm x 6.35 cm)
• Weight limit: 70 lbs (31.75 kg)
• Priority Mail Large Box: 12-1/2" x 15-1/2" x 3-1/2" (31.75 cm x 39.37 cm x 8.89 cm)
• Weight limit: 70 lbs (31.75 kg)

Other USPS Mailing Box Sizes

• USPS Large Envelope: 12-1/2" x 16-1/2" (31.75 cm x 41.91 cm)
• USPS Extra Large Envelope: 15-1/2" x 18-1/2" (39.37 cm x 46.99 cm)

Please note that these sizes are subject to change, and you should always check with the USPS website or a local post office for the most up-to-date information on mailing box sizes and weight limits.