How to Find Your Ring Size at Home

A ring should feel secure without being difficult to remove. Because finger size changes with temperature, activity and time of day, one quick measurement is rarely enough. Use the method below as a guide and repeat it before ordering.

Method one: measure a ring that already fits

Choose a ring worn on the same finger and hand as the new piece. Place it on a ruler and measure the internal diameter across the widest point, from inner edge to inner edge. Do not include the metal band itself. Compare that millimetre measurement with any sizing information provided on the product page.

Ring-size labels vary by market. Australian sizing guides often use letters, while US guides commonly use numbers. Reef & Rose options vary by design: the Carys Stackable Rings list numeric sizes 5–9 in gold-tone and silver-tone, while the Concha Adjustable Shell Ring is listed as adjustable in both finishes. These are examples, not a conversion guide. Keep your measurement in millimetres, check the exact options and fit notes for the design you choose, and do not convert a Reef & Rose numeric option to an Australian letter unless that product’s sizing system is confirmed. If a measurement or matching guide is missing, ask our team before ordering.

Paper measurement is a rough estimate

If you use a narrow strip of paper, wrap it comfortably around the base of the intended finger, mark where the ends meet, then flatten and measure the strip in millimetres. Treat the result only as an estimate: paper can shift or crease, and the measurement does not check whether a ring will pass over your knuckle or identify which sizing system a product uses. The Gemological Institute of America cautions that paper or string methods can be inaccurate and recommends professional measurement. For a more reliable result, ask a jeweller to check the intended finger with a ring sizer, then compare the product’s exact listed options and fit notes.

Measure at the right time

Measure near the end of the day when your hands are at a normal temperature. Very cold fingers can measure smaller, while heat, exercise and fluid retention can make them temporarily larger. Repeat the measurement two or three times on different days.

Consider the band shape

Wider bands often feel firmer than fine bands in the same nominal size.

For a band wider than 4 mm, a jeweller should use a wide finger-sizing gauge; narrow gauges are intended for bands up to 4 mm. If measuring an unusually wide ring on a ring stick, take the reading at the centre of the band. Check that the ring passes the knuckle with slight clearance and settles securely where you plan to wear it.

An adjustable ring should still feel comfortable and secure. Check its product page for any fit or adjustment details; the word “adjustable” does not establish an exact fit range. If you are unsure whether a design will fit, contact us before ordering.

Between sizes?

If your home measurements fall between the listed options, do not assume choosing the larger option will give a better fit. Band width affects how a ring feels; where possible, compare the available options with a jeweller or ring sizer in a similar width, and check that the ring passes the knuckle comfortably. If the options do not match your measurement, contact Reef & Rose before ordering with your measurements and the product name.

Browse the ring collection and confirm the available size options on the individual product page.

For ideas on arranging rings together, read our guide to stacking rings.

Buying a ring as a gift when you do not know their size

Use a well-fitting ring they already wear on the same finger and hand as a reference, or ask someone they trust to help confirm the size. Check the exact product page for available options. If you cannot confirm a size that suits the style, choose another piece rather than guessing. Our Jewellery Gift Guide has more ideas. If you are shopping in Australia with a set budget, see our jewellery gifts under A$100 guide for a ring, bracelet and necklace, with current prices to confirm on each product page.