I have been buying Mizuno Wave Runners for the past six years buying a size 7.5  First time purchasing the Enigma model and am extremely disappointed the size does not run similar to the Wave Runner model.  First run in the Enigma had my toes numb and formed a blister on the back of my left foot. Never before running in a pair of sneakers have I got a blister!  Haven't returned since already used for a run; expensive run!!