A complete Cabo Verde ring-size guide for 2026 โ measure your finger or an existing ring, calculate the nearest Portuguese and EU/ISO size, compare US and UK equivalents, and use a printable millimetre gauge before ordering in Praia, Mindelo or online.
For the clearest Cabo Verde ring order, begin with a physical measurement in millimetres. In the Portuguese scale used by many Portuguese jewellers, a ring near 54 mm inner circumference is commonly labelled Portuguese size 14, while the EU/ISO circumference label is approximately 54. Imported products may instead show US or UK sizes. Send the seller both the measurement and the named systemโfor example, โ54.0 mm inner circumference, about 17.2 mm inner diameter, Portuguese 14 / EU 54 / US 7 approximately.โ
Measure the hand and finger where the ring will actually be worn.
Use non-stretch paper, mark the overlap and keep the fit comfortable.
The flattened strip length is the approximate inner circumference.
Match the measurement to Portuguese, EU/ISO, US or UK and confirm with the seller.
The figures above are an easy conversion example, not an average that determines anyone's personal ring size.
A common Portuguese retail scale; size 14 is close to EU circumference 54.
The number approximately follows the inner circumference in millimetres.
Common on imported rings and international marketplace listings.
Used by British sellers and international conversion charts.
The most repeatable home reference when measuring a ring that already fits.
The safest shared measurement when comparing multiple national systems.
5.40 cm circumference becomes 54.0 mm.
17.2 mm diameter becomes 1.72 cm.
17.2 mm ร 3.1416 โ 54.04 mm.
54 mm รท 3.1416 โ 17.19 mm.
Useful when an imported guide uses inches.
Example: EU 54, 17.2 mm inner diameter.
| Portuguese Size | EU / ISO Size | Inner Circumference (mm) | Inner Diameter (mm) | US Size Approx. | UK Size Approx. |
|---|
The Portuguese column follows the widely used retail relationship shown by Portuguese jewellers, where Portuguese size 14 corresponds approximately to EU 54. Exact brand increments can differ, so retain the measured diameter and circumference.
A ring finger on the left hand can differ from the same finger on the right. Decide where the ring will be worn before measuring. Do not copy a thumb, middle-finger or opposite-hand size, especially for an engagement or wedding ring that must fit securely every day.
Cut a clean strip roughly five to eight millimetres wide. Paper is usually more reliable than elastic thread because it does not tighten under tension. Wrap it around the finger base so it touches the skin without compressing it, then check that the loop can move over the knuckle.
Use a fine pen to mark the exact overlap. Lay the strip flat and measure from the starting edge to the mark with a millimetre ruler. That length is the approximate finger circumference. Avoid thick pen marks, torn edges and rulers that begin after a damaged zero point.
Praia and much of Cabo Verde can be warm, and heat, walking, exercise, cooking, salty food or manual work can temporarily make fingers feel fuller. Cold water or strong air-conditioning can make them smaller. Measure at least three times when your hands feel normal and compare the results.
Use the calculator or chart, but write down the original circumference. If the result is 54.2 mm, do not discard the decimal and send only โ54.โ Tell the seller the measured value and the proposed size, then ask which stock size or half-size provides the best fit for the chosen design.
Choose a comfortable ring worn on the same hand and finger. A borrowed ring from another finger may look similar but produce a wrong measurement. Avoid adjustable rings, visibly oval rings and rings with an irregular inner edge when possible.
Lay the ring flat on a ruler and measure the widest straight line across the inside. Do not include the metal band. A calliper can provide a more precise reading, but a clear ruler measurement to the nearest 0.1 mm is useful when taken carefully.
Turn the ring about 90 degrees and repeat. Similar readings show that the ring is reasonably round. If the figures differ, the ring may be oval or the ruler may not pass through the centre. Use a jeweller for a valuable order when the measurement is uncertain.
Multiply the inner diameter by ฯ or enter it in the calculator. An inner diameter near 17.2 mm gives a circumference close to 54 mm, which is approximately Portuguese size 14 / EU size 54. Include both values in your message to the seller.
First measure the 50 mm test line with a physical ruler. It must be exactly 50 mm. Then place a well-fitting ring over the circles and match the ring's inside edge to the closest circle. Screen display is not a physical-size guarantee.
More skin contact can require additional comfort allowance.
The ring must pass the knuckle without spinning loosely at the base.
Heat can make fingers fuller, while cold can reduce the reading.
The same named finger can differ between the left and right hands.
Elastic material can compress the finger and understate the size.
Rounded and flat interiors can feel different at the same nominal size.
These sources provide standards information, Portuguese-scale examples, Cabo Verde jewellery context and practical measuring guidance: