Print clearly to avoid having your letter go to the wrong address. Your stamp goes in the top right corner. According to USPS, you can send any envelope weighing 1 ounce or less with just one ...

The number 8 is used for longer contracts. Business letters should be printed on company letterhead, which is 5" by 14" paper. No. 10 Shop #10 Envelopes Now inches: 4.125 x 9.5 (mm: 104.775 x 241.3) ...