Despite what the reviews said, I ordered my regular size instead of sizing up as suggested. I’m 5’3” / 125 pounds and usually wear a small. The small in these shorts fit well. They were only slightly tighter than other similar shorts, but the product name includes the word “tight” so that is obviously intentional. Like all Nike products, the quality is excellent. My only issue is that the legs ride up a bit when you run. Not a problem on short training runs, but I won’t wear these on race day.