Its actually adjustable. I have never seen a ring that has this type of adjustable band like this one has. the band is inside the ring and almost spring loaded or something. so to make it bigger you would just put it on and it expands. It fits my finger and I have very small hands. So i would say its a one size fits all ring. lol
u have really proven there's nothing wrong with this thank you for adding the picture. Far too often people do that and take pictures like that because there is damage to the item.