Now owning 9 (ex-small bottoms were returned- read below to see why) womens Hot Chillies Peach skins I can confidently say size up.  I don't have 9 of the bottoms I have 3 bottoms and 5 crew tees and 1 peach skin turtle neck.  My BF's Hot chillies Peach long sleeve tee sized true to size he's a small. As for the womens though their sizing is small.  I'm a true size 4 and nearly 5 ft 9 inches.  I find reviews telling you what you don't expect to be most useful.  I got a size Small and Extra small, the Extra small is being returned.  Thanks amazon for free/discounted returns! Received free shipping to me too.  The Extra Small's inseam is ridiculously short both right out of the box I measured them at 24 1/2 inches the smalls is too but, it's much better then the extra smalls at 27 1/2 inseam ending 3 inches above the bottom of my ankle (therefore, covering none of it).  The waist and legs of the extra small did fit me.  As for the low rise the extra smalls rise is VERY LOW 4 fingers below my navel at it's lowest point which is right there.  The smalls is 2 1/2 fingers below my navel. Fingers are next to one another for measurement and pointing side ways. DO NOT MACHINE DRY THESE on ANY medium to high heat. They WILL shrink. Hang dry is best. As for the no ankle coverage I'm okay with that. Just wear high quality wool mixed material blended socks  (outdoor type) that cover up to the bottom of them/layer under other pants/ use gaiters. These pants are naturally a little stretchy.  The photo above that shows the white pants show the rise the best on the extra small. The other photos look more like the smalls top. They don't block wind much (Like they claim too) but, come on there underwear at an unbeatable price folks! With awesome SPF protection!  Oh, I don't love that the bottom of the pants ride up on me a bit. But, if they fit u better that could lessen if not happen to you.  Otherwise, there great!