I bought these primarily to wear around the house in the cold winter months.  I got the dark gray color, which I like a lot.  I'm 5'7" and a size 4, and I got the size small which fit me perfectly.  As other reviewers noted, the low-rise isn't super low, which I like - they come to mid-abdomen and cover my behind.  They're the exact right length.  I haven't dried them in a dryer so I don't know if the length will shrink.  These pants are quite thick, which makes them perfect for what I want, which is staying warm and comfortable inside.  For me, they'd be too thick for workout pants, but I suppose it depends on everyone's personal preference..  I love the fleece lining - it's super soft and cozy.