Accessories & Jewelry
Rings, belts, hats, gloves, scarves and eyewear measurements made simple. All 9 tools below run in your browser with no sign-up and no data leaving your device.
Ring Size Converter
Convert ring sizes between US, UK, EU, JP, diameter and circumference.
Bracelet Size Calculator
Calculate bracelet length from your wrist measurement and preferred fit.
Hat Size Converter
Convert hat sizes between US, UK, EU and head circumference.
Belt Size Calculator
Find the right belt length from your trouser waist size.
Glove Size Converter
Convert glove sizes using hand circumference in inches or centimetres.
Head Measurement to Hat Size
Enter your head circumference and get hat sizes in four systems.
Hand Measurement to Glove Size
Convert a hand circumference measurement into glove sizes.
Scarf Size Guide
Convert scarf and bandana dimensions between centimetres and inches.
Sunglasses Size Guide
Convert frame, bridge and temple measurements for eyewear fit.
Getting the most from accessories sizing
Conversion tables translate one label into another, but they cannot account for how a specific brand drafts its patterns. Use a converter to narrow the range, then compare the result against the product's own measurement chart before ordering.
Keep a written record of your key measurements in centimetres. With those numbers, any chart in any region becomes readable, regardless of which labelling family it uses.
Frequently Asked Questions
When should I measure for a ring?
At the end of the day and at normal room temperature — fingers swell in heat and after exercise.
How do I pick a belt size?
Belt sizes usually run two inches above your trouser waist size so the buckle lands on the middle hole.