Recently, I took my maiden voyage to Squamish, BC. I could not wait to get on the granite there as it is absolutely pristine, so I hopped on the first 5.9 I could find. It had 20' of offwidth. The Sigma SL's are incredibly lightweight, which would make them seem like the wrong pant to use in an offwidth pitch, but I was wrong. They held up great. THat being said, I wouldnt use them exclusively for off width, but to withstand a pitch of off width and stand up to the test made me LOVE THESE PANTS!
I wear a size medium and have a 32 waist, and they fit perfect. I also bought them in the colorway Proteus, and they are such a cool color, especially with a black t shirt.
Highly recommend these pants to climbers and will replace with a new pair as soon as I have to (which I believe to be a long time from now)