Aspect Ratio: length divided by height must be more than 1.3″ and less than 2.5″.
Non-machinable letter-size pieces and pieces over 3.3 ounces are subject to flat-size rates.
Flats
Minimum
Maximum
Length
11-1/2 inches
15 inches
Height
6-1/8 inches
12 inches
Thickness
1/4 inch
3/4 inch
Flats exceeding these dimensions, rigid flats, and flats with certain characteristics are subject to parcel rates.
Postcards
Minimum
Maximum
Length
5 inches
6 inches
Height
3-1/2 inches
4-1/4 inches
Thickness
.007 inch
.016 inch
Aspect Ratio: length divided by height must be more than 1.3″ and less than 2.5″.
About Us
Accumail Express has been in business since 1995. Our goal as a company is to be able to save our customers time and money on their mailings.
