Yeah, there are many very beautiful plus size women !
After my opinion, the description "plus size model" is completely wrong and I will explain why.
Please first let us calculate these English sizes into usual sizes.
Ashley Graham has a body height of 5' 9 that means she is 175 cm tall.
Her body weight is 170 lbs that means 77kg.
So far so good.
Let us calculate: 175 cm minus 100 cm = 75 kg.
This means in medical parlance nothing else that this woman has (almost → 2 kg) a"normal" body weight.
It is a bad joke to say such a woman is a "plus-size model"
This description "plus size model" is the result of a sick fashion industry who has lost the sense of real body sizes.
Almost nobody can buy a fitting jeans pants because the pant legs are much too long.
You are forced to let reduce these pant legs.
The fashion industry has adapt oneself at the REALLY BODY SIZES of people and not contrariwise.