How much to mail square envelope

The cost to mail a square envelope depends on the size, weight, and destination of the envelope. Here are the current USPS rates for square envelopes:

Domestic Mail

• Square envelopes up to 1 oz (0.5 oz or less):
  • 1-3 business days: $0.92
  • 2-8 business days: $0.92
• Square envelopes over 1 oz (0.5 oz or more):
  • 1-3 business days: $1.22
  • 2-8 business days: $1.22

International Mail

• Square envelopes up to 1 oz (0.5 oz or less):
  • Global Forever: $1.20
  • First-Class Package International Service: $2.35
• Square envelopes over 1 oz (0.5 oz or more):
  • Global Forever: $2.20
  • First-Class Package International Service: $3.35

Additional Fees

• Insurance: $2.75 (up to $100 coverage) or $3.75 (up to $500 coverage)
• Signature Confirmation: $3.15
• Delivery Confirmation: $0.50

Size and Weight Restrictions

• Square envelopes must be at least 3.5 inches (8.9 cm) on each side and no more than 12 inches (30.5 cm) on each side.
• The maximum weight for a square envelope is 13 ounces (368 grams).

Tips

• You can use the USPS Postage Calculator to estimate the cost of mailing your square envelope.
• You can also use a postage scale to weigh your envelope and calculate the exact postage.
• If you're mailing a large or heavy square envelope, you may need to use a different type of mail service, such as Priority Mail or Parcel Post.

Remember to check the USPS website for the most up-to-date rates and regulations.