Flats are another name for large envelopes. The postage rate on a manila envelope is $1 of the same size as the one for 9" by 12" envelopes and legal size envelopes. For the first ounce, you will be ...

A fee of $0.01 is charged per piece. Postage is included in the $65 price. A rectangular envelope stamp costs $0.01 for a standard-sized envelope. Starting at $0.50, square, oversized, and ...

Please note: Letter rates are only for normal business envelopes (sizes #6 or #10), which are no larger than 6-1/8" in height and 11.5" in length. Standard manila envelopes are considered large ...