We usually used Columbian Brand but they discontinued them and Staples helped us find this item. It is a much better fit for our checks. There is less information showing thru the window.
Most the envelopes in my box did not have sufficient glue to seal the envelope. One out of five I have to tape shut on at least one side so that it does not come completely open in the mail.
We at Express Employment Professionals use these envelopes to put paychecks in. They do a great job concealing the personel info of our employees and make it easy to pass out checks by highlighting names in the window.