Formal:
* J'aime vos chaussures. (This is the most literal translation and is appropriate for someone you don't know well or who is older than you.)
Informal:
* J'aime tes chaussures. (This is more casual and appropriate for friends or family.)
* Tes chaussures sont superbes! (This translates to "Your shoes are superb!" and is a more enthusiastic way to express your appreciation.)
* J'adore tes chaussures! (This means "I love your shoes!" and is very enthusiastic.)
To make it even more personal, you can add:
* J'aime beaucoup tes chaussures. ("I really like your shoes.")
* Elles sont magnifiques! ("They are magnificent!")
The best option will depend on the context and your relationship with the person you are speaking to.