These little envelopes perfectly fit the payments needed to send. It's not too large nor too small. For a small business it's perfect for manual or printed checks. I use these for my personal bills.
I do not want to sound like a dope. However this product is just an envelope. It is a good fit. I can put letters in it. Subsequently I can place it in the mail where it will set sail. Yup. I wrote on the envelope. Then let it set sail in the mail.