Standard envelope like many others but the catch here is that these WILL NOT SEAL properly and are coming open by the time you get them to the mailbox/drop maybe the idea is that these are supposed to be resealable for those that forget to put everything they mean to in the envelope in the first place but if that's the case then MARK THEM AS SUCH. I have serious doubts that the flap would stay closed on the journey to recipient even if handled very gently so I must tape the flap closed. If you mail anything other than full size sheets things like an event ticket or business card don't expect them to be in the envelope at delivery. What's the point of a security envelope that won't stay sealed!?
Glad to be able tp purchase and have shipped. Would prefer that these type of envelopes would be stocked in stores. Usually when needed want them now rather than a week later or more. Did appreciate the shipping. The ones in stock in the stores were requiring purchase of 100 or more!!!! Homes aren't offices. I assume you are catering to individuals also not just businesses.