Accessory size charts
Ring, hat and glove sizes all describe a part of the body in millimetres or inches. Once you know what a size measures, converting it is arithmetic.
In this section
- Ring sizesConvert ring sizes between US, European (ISO) and Japanese sizes, or find a size from the inner diameter or circumference in millimetres.
- Ring sizerCalibrate your screen with a bank card, match a disc to the inside of a ring that fits, and read its diameter and US, ISO and Japanese size.
- Hat sizesFind your hat size from your head circumference in centimetres or inches and convert between European, UK and US hat sizes.
- Glove sizesFind your glove size from your hand circumference and hand length in millimetres or inches, for work gloves sized 6 to 11 and for dress gloves.
What each size measures
- Rings: the inner circumference or inner diameter of the ring.
- Hats: the circumference of the head, or the diameter that belongs to it.
- Gloves: the circumference of the hand around the palm.
What is left out
British letter sizes for rings and belt sizes are not covered. We could not verify the letter scale, and the belt rules of the brands we checked contradict each other.