70s model. www.bing.com/.../search
models now www.bing.com/.../search
Most Helpful Girl
Models back then definitely looked more natural, with way cuter swimwear than now.
There are certainly slim girls with big boobs in real life, though, so it is possible to see everyday females walking down the street that are shaped like a typical model. Because many models are photoshopped, however, of course you can't look exactly like one because models themselves do not, in real life, look exactly like what they do after being airbrushed. But some girls look pretty darn close. Many of the tall, slim girls I know don't have boobs that big, though. Usually they're around B-cups, at most. But it is possible.