If only the thighs are thick, it will be easier to deal with. Wearing an A-shaped skirt with a length just covering the thigh on the knee can cover up the shortcomings of the thigh and make the waist look thin.

If you wear trousers, people with thick legs will generally wear trousers with micro-horns to make their legs thinner.

Remember, if you are not tall, you'd better not wear loose pants, otherwise you will look shorter.