5-8k.. Depending if they are bolt on (which they appear to be) or just a "reel-in" job...
Them're bolt-ons. Pretty good work, actually, but I'd guess her surgeon tried to take her from an A cup to a DD cup, which is hard to do unless the gal is well-marbled. She's awful thin, but if they're silicone rather than saline, after she packs on 15-20 pounds you won't even be able see or feel that they're bolt-ons.
Just my professional opinion, mind.