My head measures 23" and neck 15". Looks like a large, but wanted to confirm that this new model is true to size? Need it to fit tight around my temples to prevent critters (barnacles) from entering my ear canal during boat bottom cleaning.
KATHRYN K This item did not fit me so I didn't keep it, can't remember the sizing either. Sorry!
DIANNE M I had previously owned a Small, 3mm Henderson Gold cap-I could wear it or the Medium (which I borrowed from my daughter when I lost my Small). My head measures 20 3/4 at forehead, and Neck 12 1/2. I ordered a Small in the new Henderson 2mm microprene cap and it was too large, I had to return it. My impression is they are running large.