You have a lot of clothing for sale.
If you are getting a large amount of INAD returns, it may be worth accepting returns on the clothes you sell.
That way, if the item doesn't fit, isn't quite what the buyer expected, or they are just a bit disappointed, they do have the option of returning the item at their own expense without opening a (possibly fake) INAD case.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)