I ordered the XL and I am 5' 11", 220 lbs. The waist is very snug and will likely be too tight over layers, and I wear a 36 waist in pants. The length is spot on, if not a little long. There is plenty of room in the seat, but not quite enough to look like MC Hammer pants.
Looks like a good rain pant, high quality. After reading reviews I struggled with what size to order. I am 6-0, 197 lb, and wear 38 waist 32 leg jeans. I am *not* long in the leg, more like average or below. I bought an XL which turned out about right. The elastic waist fits me well, any smaller and it would be too tight. Length is ok - I wouldn't mind an inch or two longer but they will do as is. There seems to be plenty of vertical room for wearing the waist higher or lower on yourself, which can help adjust the leg length.
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