Which DS to get for wife?

Sup Polynauts, I know next to nothing about 3DS or DS having not owned a nintendo console since I was a wee child.

That said, I'd like to surprise the wife with a red / pink one this christmas. Are the newest models out yet? I read somewhere a new line had been announced at E3 but I'm not sure these are the same as the ones I'm seeing on Amazon.

She's small so should I avoid the XL?

Any tips would be appreciated!