I was able to get the size I needed for the use I have in mailing envelops. They seal well with adhesive and clasp to insure no lose of internal materials.
I am the co-editor of our Churches Missionews letter and I mail 22 of them each month to different people that want them but no longer attend our Church. They like that they arrive in great shape. No torn pages. They also are great for holding important papers. I have been using them for over 13 years. I started doing it to help the lady who was ill at the time. She never recovered and my daughter and I still print it out and I mail them eash month.
They are brown envelopes. They have clasp closures. They can be glued for mailing. They are less expensive when bought in large quantities. What more can be said for them?