weird ribs?? is it normal??

ar
I am currently around 5ft, and I weigh 104-106 lbs, yet my ribs stick out, beyond my stomach, and I know its not just because of fat because i can feel the different bones in my ribs, im just wondering if this is normal? 
(I know age might be a factor, and I don't want to give my age out but I am a teenager if that information helps)