I own several pairs of Ahnu shoes and boots, including the Ahnu Kezar Leather Chelsea Boot. It's been my experience that Ahnu shoes and boots fit true to size including the Ahnu Kezar Chelsea Boot. I've been able to pair this boot with either a light or medium hiking socks without any fit issues. I wear a size 8.5 medium width and have always ordered the Ahnu brand in that size without any problems. I must confess that being use to wearing a lace-up boot, it took me a short while to get use to this style of boot but once I did the fit and finish made them so comfortable to wear. I highly recommend Ahnu shoes and boots!
I bought them for my son and they were a true size fit for him.
According to our fit team this item is running true to size.