I love these pants, they are so cool its like wearing nothing! I have another pair in black that I also love, as with them I think the waist is a stiffer material and smaller than the other Columbia long shorts that I have and love also. Like the ability to cinch the bottoms and great pockets to carry phone etc on my walks. They stretch a little once you wear which helps with the waist being a tad smaller. I rarely wear anything else on hot summer days than this Omni shield/shade material. I weigh 146 and the 12 fits great. I don't have a slim waist or tum. Im 5ft and they come a bit below my knees comfortably.