Does cycling slim legs?

I'm curious, does cycling actually help slim down legs? I've heard conflicting opinions on this topic and would like to get a clearer understanding. Some people swear by cycling as a way to tone and shape their legs, while others claim it can actually bulk them up. As someone who's looking to incorporate cycling into my fitness routine, I'd like to know if this activity is truly effective for achieving slimmer, more toned legs. Can you provide some insight on this matter?