Is it posible add option to set coiling value


As you know we can use imagesprite and ball on canvas component.When Ball coiled with ball we can track it.I want set lower coiling size.

İf my imagesprite 40x40px square my coiling area have the same width and height.I want use lower sizes for trigger coiled event without set imagesprite size to lower values like 30x30

So i want 40x40px for my imagesprite and I want use 30x30 px for coiling area is it posible