maxim Hats Newsboy Cap (Casquette) Hat Cap For Ladies, Girls For Men, Boys I think it's unisex. Measured with a measuring tape. I've uploaded photos, so please check them. Actual measurement: Approximately 56cm to 57cm Men's size: About M I think I'm M myself. It's the perfect size for me. Or, it stretches, so it's a little loose. The size is shown in the photos. Please look carefully and confirm before purchasing!! We offer no guarantees. Also, it is listed elsewhere. Please check if it is in stock before pressing the purchase button!! I am not accepting price reduction offers.