Do not know the ring size can be divided into two situations to find a way. One is to secretly buy an engagement ring, if the girlfriend has the habit of wearing a ring, you can understand the finger size by decorating the ring size, or secretly measure the finger size when the girlfriend is sleeping, or ask the side of his friend to understand the finger size. The other is to buy it openly, you can directly take your girlfriend to the jewelry store to buy and understand the size of her fingers.
