Formal:
* J'aime beaucoup votre style. (I really like your style.) - This is the most direct and polite way to say it.
* J'apprécie beaucoup votre style. (I appreciate your style a lot.) - This is another polite option that emphasizes appreciation.
* Votre style me plaît beaucoup. (Your style pleases me a lot.) - This is a slightly less formal option, but still polite.
Informal:
* J'aime bien ton style. (I like your style.) - This is a more casual way to say it, used with friends or people you know well.
* Tu as du style ! (You have style!) - This is a very informal and complimentary way to say it.
More specific:
* J'aime la façon dont tu t'habilles. (I like the way you dress.) - This is more specific and focuses on the person's clothing style.
* J'aime ton style vestimentaire. (I like your clothing style.) - This is another way to focus on the person's clothing style.
The best way to say it depends on the context and your relationship with the person.