"I want a ring, but I don't know my size."

When purchasing a ring online, many people's first concern is choosing the right size.

This is especially true for those who don't often wear accessories,

• Unsure what size to choose
• Unsure how to measure at home
• Worried if the size doesn't fit

But ring sizes can easily be measured at home.

This article will clearly explain how to measure your ring size at home and tips for choosing the right size without mistakes.

Japanese ring sizes are expressed in "go" (号).

Generally speaking,

• Women → Around size 7 to 11
• Men → Around size 13 to 19

are often chosen, but there are individual differences, of course.

The size can vary not only due to finger thickness, but also due to:

• Joint size
• Tendency to swell
• Whether it's your dominant hand

It can be surprisingly difficult to determine the correct size by appearance alone.

First, we will explain the measurement points.

If the size of your finger at the base is the same as or larger than your second knuckle, please measure the base of your finger.

If your second knuckle is thicker than the base of your finger → Measure your second knuckle.

Method ① Using thread or paper

・Prepare a thin piece of paper or thread
・Wrap it around the part you want to measure
・Measure the length
・Compare it with the circumference size chart

However, this method is prone to errors, so it should only be used as a guideline.

Method ② Using a ring sizer

This is the most accurate method.

It is a specialized tool for measuring ring sizes, and you can easily measure at home.
Dedicated measuring tools can also be purchased on the COIL website

Sizes change due to swelling

Finger size varies depending on the time of day.

Especially

• at night
• in summer
• after drinking alcohol
• after exercising

your fingers tend to swell.

It's not uncommon for your size to change between morning and night.
We recommend a fit that is snug when swollen, but slightly loose normally.