| Size | First Class Rate |
|---|---|
| Postcards (5"x3.5" to 6"x4.25") | $0.267 |
| Letter-size 3.5oz or less | $0.407 |
| Flats 1oz or less | $0.615 |
| Flats 1-2oz | $0.765 |
| Size | Standard Mail | Non-profit |
|---|---|---|
| Letters 3.5oz or less | $0.280 | $0.170 |
| Flats 4.0oz or less | $0.539 | $0.365 |
Your mail piece is a "Letter" if it falls within these dimensions and weight.
(Certain pieces heavier than 3.3 oz are subject to being prepared as letters but paid as a flat)
Your mail piece is a "Flat" if it exceeds one of the letter size dimensions and does not exceed the maximum flat dimensions.
Exceptions to the minimum size: Every-Door direct mail pieces can have a length of 10 1/2 inches.
Flats cannot be too rigid and must be uniformly thick (within 1/4 inch).
