About ring size

The size of a ring is indicated by its inner circumference.

The most common unit of size is the number "gou", and Liquem's ring sizes adopt the JCS (Japan Custom Size) standard which is commonly used in Japan.

Additionally, any products marked as "free" are free rings with no fixed size.
This ring can be adjusted to fit your finger by applying a little pressure to open the ring fittings.

The size can be adjusted, however, expanding the metal fittings too much may cause deformation, malfunction, or parts to come off, so you can only expand them by a maximum of 2 to 3 sizes. For example, a "free size 9" will be a size 9 if worn without adjusting the size, but can expand to a maximum of about a size 11 or 12.

At the same time, We also provide a chart of O-ring sizes according to ISO standards (International Organization for Standardization standards; for general industrial use) and the inch sizes commonly used in the United States.
Please use this as a reference when choosing a ring.