The Envelope Company manufactures a variety of standard size envelopes and keeps them in stock for fast shipping to your door. Some of the sizes we carry are: #6 3/4, #8 5/8, #9, #10, #6 1/2 and #9 Remittance, 6 x 9, 9 x 12, 10 x 13. As you can see, we have a huge selection of envelopes in various sizes and colors. We also produce custom envelopes and you can Request a Quote today!