Perfect fit, comfortable but still snug against the legs. I find myself reaching for these trackies now that the weather is cooling down, they are great for wearing around the house and on walks. I like that they are made using French terry looped fabric rather than brushed fleece as they look better after multiple washes. They are not a heavy fabric and have a good amount of stretch, I have bought them for my daughters as well all love them. The size xs fits a child’s size 12.