Domestic Dimensions
Postcards
![Valid Postcard Dimensions Valid Postcard Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/Domestic/domestic-postcard.jpg)
Property | Minimum | Maximum |
---|---|---|
Length | 5 inches | 9 inches |
Height | 3-1/2 inches | 6 inches |
Thickness | 0.007 inch | 0.016 inch |
Letter
![Valid Letter Dimensions Valid Letter Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/Domestic/domestic-letters.png)
Property | Minimum | Maximum |
---|---|---|
Length | 5 inches | 11-1/2 inches |
Height | 3-1/2 inches | 6-1/8 inches |
Thickness | 0.007 inch | 1/4 inch |
Flats
![Valid Large Envelope Dimensions Valid Large Envelope Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/Domestic/domestic-large-envelopes.png)
Property | Minimum | Maximum |
---|---|---|
Length | 11-1/2 inches | 15 inches |
Height | 6-1/8 inches | 12 inches |
Thickness | 1/4 inch | 3/4 inch |
Parcel
![Valid Package Dimensions Valid Package Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/Domestic/domestic-parcels.png)
Length: the longest side of the parcel
Girth: measurement around the thickest part (perpendicular to the length)
Length plus girth combined cannot exceed 108 inches. (USPS Retail Ground cannot exceed 130 inches.)
International Dimensions
Postcards
![Valid Postcard Dimensions Valid Postcard Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/International/international-postcard.jpg)
Property | Minimum | Maximum |
---|---|---|
Length | 5-1/2 inches | 6 inches |
Height | 3-1/2 inches | 4-1/4 inches |
Thickness | 0.007 inch | 0.016 inch |
Letter
![Valid Letter Dimensions Valid Letter Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/International/international-letters.png)
Property | Minimum | Maximum |
---|---|---|
Length | 5-1/2 inches | 11-1/2 inches |
Height | 3-1/2 inches | 6-1/8 inches |
Thickness | 0.007 inch | 1/4 inch |
Large Envelope
![Valid Large Envelope Dimensions Valid Large Envelope Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/International/international-large-envelopes-flats.png)
Property | Minimum | Maximum |
---|---|---|
Length | 11-1/2 inches | 15 inches |
Height | 6-1/8 inches | 12 inches |
Thickness | 1/4 inch | 3/4 inch |
Package
![Valid Package Dimensions Valid Package Dimensions](https://cdn.statically.io/img/postcalc.usps.com/Images/International/international-packages.png)
International Packages except First-Class Package International Service
Length is the longest side of the parcel.
Girth is the measurement around the thickest part of the parcel.
Length plus girth cannot exceed 108 inches.
First-Class Package International Service
Size—Other than Rolls
Maximum length = 24 inches
Maximum length + height + thickness combined = 36 inches
Size—Rolls
Minimum length = 4 inches
Minimum length + twice the diameter combined = 6-3/4 inches
Maximum length + twice the diameter combined = 42 inches
M-Bag
There are no defined size limits so long as articles being sent can be enclosed in the mailbag.