tights go from your waist to your feet..they are one piece.
pantyhose are the same thing as tights but they are made of a thinner material and they are sheer, they generally are skin colored.
theyb oth have the purpose of covering the legs. partially to provide warmth although pantyhose are often used to give a more sleek professional look to your legs, like they make your bare legs look better and smoother.
leggings are like sheer stretchy pants. they end above the ankle...some end right below the knee, others mid calf. some are very sheer and should only be worn under things (though unfortunately some women wear them plain and the world gets to see their ass...nasty). people wear them under dresses or skirts, it gives a casual look and they are more comfortable than tights or pantyhose and also more casual looking although I find it looks a bit juvenile and tacky with a dress or skirt. it may look okay with a long tunic.
non sheer leggings are worn to work out or for casual errands. with a big shirt leggings look okay for running errands and they look okay for working out but I don't think theyl ook good worn as pants.
tights and pantyhose are not always that comfortable because they have a tight waistline. they are supposed to be like that, but it gets annoying.
leggings are like thin pants that only cover part of your leg. They are for wearing under short dresses and skirts, (although some people wear them as pants -.-) Tights are thick, and cover the whole leg, like pants, but they cover your feet, too. They are similar to pantyhose, but slightly thicker. They are for longer dresses, or if you just want to wear something nicer than socks. Pantyhose is for nice outfits, like dresses. It basically just covers your skin, and makes you look more professional. It adds SOME warmth, but not a whole lot, since they're made of nylon...
Pantyhose give legs a very sexy look that bare skin, leggings and tights can't do. They even out the skin, make your legs look shiny and if it is the right color appears as if you aren't wearing anything.
They just happen to be a pain to put on and go to the bathroom with.
I think everybody has described the tights and leggings well. I prefer wearing thigh highs. I like the way they look and feel. When I'm wearing a skirt or dress, I wear them or I go bare . I don't wear tights or leggings much.
I adore wearing leggings (: okay so leggings are thicker and have a more pants look to them ... and tights you'd wear under a dress or something they are full foot ... and pantyhose are usually see through full foot and make your legs look smoother...
Pantyhose are thin and I wear when under dresses, I they usually are dressy. Tights and Leggings I think are about the same. When I think of tights that I own I think of medium kinda thin. When I think of leggings I think of my winter leggings so if I want to wear dresses I can or skirts They are kind of thick. Leggings and tights are more casual but can be dressed up.