The envelopes would be great if they would seal. I have purchased them in the past and they didn't seal but I had hoped it was just a bad run. Apparently not. I always have to tape them shut because the glue does not hold at all. Very disappointed and will not buy them again.
Good envelopes-paper is proper thickness consistent size. However of the dozen or so I’ve used so far two had weak adhesive and needed to be reinforced with tape.