Weight and Shape/Size
Domestic Dimensions
Letter
| 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 |
Large Envelope
| 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
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 Ground Advantage® cannot exceed 130 inches.)