* Ring size conversion
UK Z+4 ring size conversion
UK Z+4 is an inside diameter of 23.2 mm (circumference 72.9 mm). In other systems that is US 14.5 = UK Z+4 = EU 73 = Japan 27.
Published July 11, 2026
UK Z+4 — full conversion
- Inside diameter
- 23.2 mm
- Inside circumference
- 72.9 mm
- Japan
- 27
- US / Canada
- 14.5
- UK / Australia
- Z+4
- EU (ISO)
- 73
Nearby sizes
- Ø 22.8 mm — US 14 = UK Z+3 = EU 72 = Japan 26
Buying tips for UK Z+4
- Wide bands feel tighter — consider going up ~½ US size for bands over 6 mm.
- Printable paper sizers are often ¼–½ size off; prefer a metal gauge at a jeweler.
- Selling the ring for gold? Check 18K ring melt value or the karat × weight calculator.
* Frequently asked
FAQ
- Q. What is UK Z+4 in other ring size systems?
- A. UK Z+4 converts to US 14.5 = UK Z+4 = EU 73 = Japan 27.
- Q. What is the diameter of UK Z+4?
- A. Inside diameter 23.2 mm; inside circumference 72.9 mm.
- Q. How should I measure my finger?
- A. Measure at the end of the day when fingers are warm. The ring must clear the knuckle; if knuckle and base differ, size for the knuckle and consider a comfort-fit band.
- Q. Can every ring be resized to this size?
- A. Most gold and platinum bands can move 1–2 sizes. Tension settings, eternity bands, and some titanium/tungsten rings cannot. See a jeweler before ordering a resize.
* Try it
Identify the jewelry in your hand, right now.
Just take a photo — AI reads the metal, gemstone, hallmark, era, and an estimated value range in seconds. First two scans free, no account required.
* Related