I say 11ish.
On a side note, I should probably mention that I am a fairly strong person (yes, I do lift weights regularly), and I am cosplaying as Morgiana. If you weigh 150lbs or less (with costume on) I will be able to carry you during photos if you wish.
"Real badasses eat chocolate chip cookies, I'ma gonna get that tattooed across my back in Old English font."~ Tiny Tina