I have purchased a lot of tights like these.  I am 5'6" and weigh 135 lbs.  The upside to these is that the upper part is so thick it's unlikely to tear or snag easily.  The downside is that the sheer part is pretty thick and not natural on my pale skin.  I am very fair, blonde with blue eyes and fair skin with reddish undertones.  If you are looking for something sturdy go with these.  If you are looking for something that appears as though you have on only thigh highs with nothing above look elsewhere.