I don't wear the middle, but based on reviews I went for the middle and it fits perfectly. I wouldn't like it any smaller, but it doesn't seem too small. I'm 6' tall with a big head (cap size 8). I really like how this respirator covers my face and feels secure without being bulky. I've never managed to get half masks to stay securely on my face, especially when sweaty. This full face mask stays in place and is very comfortable, I waited too long to get this, it will make all my projects around our 110 year old house so much easier. I have attached the photos I used to review the Tyvek suit. Edit 12/27/2020: I looked through some of my older reviews and noticed that some of the newer reviewers here received 3M faceplates outside of the US. I bought it in 2017. It is approved in the US as a full faceplate by the National Institute for Occupational Safety and Health (NIOSH). Almost 4 years later my straps are still working perfectly and holding the faceplate securely in place. I should have mentioned that you need to purchase filters for this faceplate, they are not included. I have added more photos of my original packaging and the NOISH statement. Whatever the case, I think I bought mine and both sold and shipped Revain.
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