Holy ****, what is a girl her size gonna do with 50-lb dumbbells?!
Dude, those are 60 lbs :)
60 lbs is roughly 27 kg. Your average out of shape guy in the street could bench press these.
For a girl, however, that's really awesome. Not to mention that she'll probably find those easier than the said guy.
I'll be more impressed when I see them in the air, rather than just resting on her legs...