The glasses fit my head nicely after comparing sizes from previous glasses bought (thanks for adding measurements in the description!) I notice an immediate difference wearing these throughout the work day since Im on the computer 9-5 and then sometimes keep them on to watch TV after. When I don't wear them and feel a headache coming on or feel mild eye strain, I pop these on and feel an almost immediate relief. They also look baller. Overall a solid purchase. Would recommend.