Sweatpants For Women – Best Price!

I am about 5′0 and 16 and I weigh about 130 lbs, I have a bum and thighs and breasts I’m not fat but I have a little bit of a belly but not noticeable or even that much, people love my body, the thing is I can NEVER properly fit into pants/jeans no matter what store or how many different sizes considering I’m short and curvy the pants either are too big or too tight and uncomfortable. So basically the only bottoms I feel comfortable in are sweatpants or yoga pants, but I’d really like a nice pair of jeans that comfort me. Do you know if there are any stores that are for curvy women?

My schools clothing orderform just came out and i decided i am ordering a pair of school sweatpants. They are really cute, have STA written horizontally down the left leg and "Thunder" across the bum and are grey. Only problem is I have no clue what size to order. I am in the 10th grade and am average size. I wear a size 7/8 in jeans. These are unisex pants so the sizes are generic I’d assume. The sizes are S (small), M (medium), (large), XL(Extra large). I ordered a pair last year in large and they were much to big for me also. Thanks in advance for your help.