Find your ring size in Coffs Harbour, NSW โ full AU/UK letter chart with US, EU conversions, inside diameter, circumference in mm, and a free size calculator
Coffs Harbour uses the standard Australian ring sizing system โ letter sizes A through Z, identical to UK sizing. The most common women's size is AU/UK size MโN (US 6.25โ6.75, EU 52.5โ54, diameter 16.7โ17.1 mm). For men, the most common size is AU/UK size RโT (US 8.75โ9.75, EU 59โ61.5). Coffs Harbour's warm and humid coastal climate can cause finger swelling โ always measure at the end of the day for the most accurate all-day fit.
Thumbs are the widest finger. Thumb rings must pass over the knuckle for a comfortable fit.
Slightly larger than the ring finger. Usually requires going up half a letter size from ring finger measurement.
Usually the largest of the three centre fingers. Similar in size to the index finger on most hands.
The primary sizing finger. Average AU N (US 6.75). Engagement and wedding rings are worn here.
The smallest finger. Petite AU FโH sizes may need specialist ordering from a Coffs Harbour jeweller.
Highlighted rows represent the most commonly purchased ring sizes in the NSW Mid North Coast region. AU ring sizes use the same letter system as UK sizes โ UK size N equals AU size N with no conversion required.
| ๐ฆ๐บ AU / UK Size | ๐บ๐ธ US Size | ๐ช๐บ EU Size | Diameter (mm) | Circumference (mm) | Fit Guide |
|---|---|---|---|---|---|
| F | 3 | 44 | 14.1 mm | 44.2 mm | XS / Petite |
| G | 3.5 | 45.5 | 14.5 mm | 45.5 mm | Petite |
| H | 4 | 46.8 | 14.9 mm | 46.8 mm | Petite |
| I | 4.5 | 48 | 15.3 mm | 48.0 mm | Small |
| J | 4.75 | 48.7 | 15.5 mm | 48.7 mm | Small |
| K โญ | 5.25 | 50 | 15.9 mm | 50.0 mm | Popular โ |
| L | 5.75 | 51.2 | 16.3 mm | 51.2 mm | Popular โ |
| M โญ | 6 | 52.5 | 16.7 mm | 52.5 mm | Most Common โ |
| N ๐ | 6.5 | 53.8 | 17.1 mm | 53.8 mm | Most Common โ |
| O โญ | 7 | 55.1 | 17.5 mm | 55.1 mm | Popular โ |
| P | 7.5 | 56.3 | 17.9 mm | 56.3 mm | Popular โ |
| Q โญ | 8 | 57.6 | 18.3 mm | 57.6 mm | Popular โ |
| R ๐ | 8.625 | 58.9 | 18.8 mm | 58.9 mm | Most Common โ |
| S ๐ | 9.125 | 60.2 | 19.1 mm | 60.2 mm | Most Common โ |
| T โญ | 9.625 | 61.4 | 19.6 mm | 61.4 mm | Popular โ |
| U | 10.25 | 62.7 | 20.0 mm | 62.7 mm | Popular โ |
| V | 10.625 | 64.0 | 20.4 mm | 64.0 mm | Popular โ |
| W | 11.25 | 65.3 | 20.8 mm | 65.3 mm | Large |
| X | 11.625 | 66.6 | 21.2 mm | 66.6 mm | Large |
| Z | 12.5 | 68.5 | 21.8 mm | 68.5 mm | XL |
| AU / UK Size | ๐บ๐ธ US Size | ๐ช๐บ EU / ISO | ๐ฏ๐ต Japan | Diameter (mm) |
|---|---|---|---|---|
| K | 5.25 | 50 | 10 | 15.9 mm |
| L | 5.75 | 51.2 | 11 | 16.3 mm |
| M โญ | 6 | 52.5 | 12 | 16.7 mm |
| N ๐ | 6.5 | 53.8 | 13 | 17.1 mm |
| O โญ | 7 | 55.1 | 14 | 17.5 mm |
| P | 7.5 | 56.3 | 15 | 17.9 mm |
| Q | 8 | 57.6 | 16 | 18.3 mm |
| R ๐ | 8.625 | 58.9 | 17 | 18.8 mm |
| S โญ | 9.125 | 60.2 | 18 | 19.1 mm |
| T | 9.625 | 61.4 | 19 | 19.6 mm |
Coffs Harbour's position on the NSW Mid North Coast means high year-round humidity. Moisture in the air can cause fingers to swell slightly โ avoid measuring after time spent at the beach or in the ocean.
Summer temperatures regularly reach 28โ32ยฐC in Coffs Harbour. Heat causes blood vessels to dilate, expanding finger size by up to half an AU letter. Measure indoors at room temperature for accuracy.
Fingers reach their largest size in the late afternoon and evening after daily activity. Always measure at the end of the day โ morning measurements are often half a size too small.
The dominant hand's fingers are typically half a letter size larger from regular use and muscle development. Always measure the exact hand the ring will be worn on โ not the other hand.
Wide wedding bands over 6mm fit noticeably tighter than narrow rings at the same AU letter size. When ordering a wide band, always go up half an AU letter from your measured ring finger size.
Significant weight gain or loss, pregnancy, and natural ageing all change finger size over time. If your last ring sizing was more than 2 years ago, re-measure before ordering a new ring.
Cut a strip roughly 1 cm wide and 10 cm long. A piece of non-stretch dental floss or thin string also works accurately and is easy to use on all finger types.
Wrap snugly around the base of the finger you will wear the ring on. Make sure the strip can still slide over the knuckle โ if it cannot, measure at the knuckle and round up half a size.
Use a pen to mark exactly where the strip overlaps. The length from the strip's end to that mark is your finger circumference in millimetres.
Lay the marked strip flat against a rigid mm ruler. Note the measurement and enter it into the Coffs Harbour Ring Size Calculator above for your instant AU result.
Find your circumference in the full AU size chart above. Read across for your matching US, EU, and Japan equivalent for international online orders.
Pick a ring that fits the correct finger on the correct hand comfortably. Do not use a ring from the opposite hand as each hand may differ by up to half an AU letter size.
Use a rigid mm ruler to measure straight across the inside opening of the ring in millimetres. This is the inner diameter of the ring band.
Find your diameter measurement in the full AU size chart above and read across for your AU/UK letter, US size, EU size, and Japan equivalent.
Coffs Harbour's warm, humid coastal climate makes several of these mistakes particularly common. Each one can result in a ring that is the wrong size โ even when you believe you've measured carefully.
Fingers are at their narrowest first thing in the morning before activity and circulation increase their size. A morning measurement often produces a ring half a letter too small.
Time in the surf, ocean, or rock pools at Coffs Harbour temporarily swells fingers from salt water and activity. Always wait at least 30 minutes after any beach activity before measuring.
The dominant hand's fingers are typically half an AU letter size larger. Always measure the exact hand and exact finger the ring will be worn on for a correct result.
Some UK retailers list half-letter sizes such as Nยฝ. Standard AU sizing uses whole letters only. Confirm which system your retailer uses before placing an order from Coffs Harbour.
Elastic or cloth tape measures compress unevenly against the finger and produce unreliable readings. Always use a non-stretch paper strip and measure against a rigid millimetre ruler.
US, EU, Japanese, and Indian ring sizes all use different scales from AU letters. Always confirm which sizing system a retailer uses before purchasing any ring from an international online store.