The circumference of the Chow Tai Fook No. 13 ring corresponds to 56.7mm and the diameter is 16.5mm. Chow Tai Fook is a ring brand from Hong Kong, China, using the Hong Kong standard ring size codes. According to the ring size chart on the official website of Chow Tai Fook, the circumference of its No. 13 ring is 56.7mm, and the corresponding inner ring diameter is 16.5mm.
Chow Tai Fook Official Size Chart
How to calculate the ring size
The measurement of ring size can be done by measuring the circumference, referencing old rings, or visiting a professional jewelry store.
1. Perimeter measurement method
Wrap a thin strip of paper or thread around the finger who wants to wear the ring, and mark the intersection; Then use a ruler to measure the length from the beginning of the paper strip to the mark, which is the circumference of the finger; Finally, based on the measured finger circumference, you can compare and find the ring size that suits you.
2. Refer to the old ring
If you just don't know the specific size, but already have a suitable size ring, you can use the old ring directly. Place an old ring of appropriate size on paper, draw a line along the inner circle, and measure the size of the ring based on the inner circle line.
3. Jewelry store measurement
By trying on ring models of different sizes in jewelry stores, find the most suitable ring size for yourself. But if you try it on in winter, due to the colder weather, your fingers will be thinner than in summer. Therefore, choosing to try it on in the afternoon or evening can result in more accurate measurements.