A breast implant is disc shaped and ends abruptly.
Big real boobs are smooth, hang more and are wider spread than fake.
The shape is a much better indicator of boobs being fake.
Amateur Nudes is a picture and video sharing site in which allows for the uploading, sharing and general viewing of various types of adult content, focused on amateurs naked and amateur nudes, and while does the best it can with verifying compliance, it may not be 100% accurate.
.
This girl has a lot of tissue towards her armpit, which doesn't happen with fake boobs.