I'm currently 5'3 1/2. 110 lbs. chest size 33B ish. I wear an extra small size shirt WIDTH (in) 16 LENGTH (in)26.5...I do have some small shirts but i find it a little too big for me. im getting my first shot next month. im gonna work out to get a wider and more masculine back. i wanna buy clothes and renew my ward drobe. i was wondering if i should continue buying a size extra small or small (36-38)
me: http://img205.imageshack.us/img205/9248/mmmpy.png

Looks more masculine than I do.

I think you might have to move up to a small.

Thanks! But do you think it'll be a little too long and baggy for me? I'm more of like a pretty boy that shop at stores like topman and urbanoutfitters.

I'd wait and see how things go.  You probably will fill out across the shoulders some and in the waist, but you are also likely to lose some size up front and around the hips, so you may not need a larger size in the end.  Me, I've dropped a couple sizes.  But then, I was overweight to begin with.  (Still am.)