You don't have to go to the store, but the measured data will be more accurate. If you measure yourself, the method is relatively simple. Just wrap a piece of hard paper around your finger, then mark the intersection with a pen, then measure the length of the paper with a ruler, and you can know the result according to the ring size comparison table. There will be some errors in this measurement data, so it is better to measure it several times. In addition, if you want to choose a ring, you should pay attention to the choice of ring size table. Different brands use different versions. For example, a man can only customize one DR diamond ring in his life, and he uses the Hong Kong version. Remember to know clearly in advance.