I am 6' and 250 with nice size legs and these fit wonderfully, are long enough, very comfortable, and do not bind at the ankle area like George and some other brands of footless tights. The XXL are generous, but they have enough Spandex to hug and not sag or lose their shape. The XL is a bit more snug.  These are opaque, but they are not too hot to wear in summer weather if you're not outside all day.  These are my go-to under dresses that are a tad too short (being tall means 39" dress on me is more like 35") and gives a sleek look with a pair of cute wedges (especially in the office environment or for church).  I wear them under thinner leggings for extra coverage and they keep everything from jiggling and smooth my 'dimples'.  They smooth you under slacks that might otherwise be less flattering in the upper thigh/rear area.  I have been purchasing this brand for 10 years.