I think it looks perfect on you, but then again, I LOVE big bags. I'd say keep it if it doesn't get on your nerves or anything. It's up to you. You have to love it. Good luck w/ your decision! I love the black sig carly!
Wow..you must be really petite! My med signature doesn't look as big as yours (time to hit the gym I guess! ). It looks great on you...I dont think anyone can go wrong, no matter which Carly they choose!