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Use Our Online Calculator

Find Your Ring Size with Ease

A ring that fits just right feels effortless, empowering, and uniquely you. Whether you're shopping for yourself or gifting someone special, getting the right size matters. At Vinca Jewelry, we’ve made it super easy. Use our free Ring Size Calculator tool below—no guessing, no stress. Just a quick measure and you're ready to shine.

Ring Size Calculator

How to measure:

  • Circumference: Wrap a non-stretchy string or paper strip snugly around the base of your finger. Mark where it overlaps. Measure the length in mm or inches.
  • Diameter: Take a ring that fits the intended finger well. Measure its internal diameter in mm or inches.

1. Select your measurement method:

2. Enter your measurement:

This calculator provides an estimated ring size. For the most accurate sizing, we recommend visiting a professional jeweler or ordering our Vinca Jewelry Ring Sizer tool. Finger size can fluctuate with temperature and time of day.

Prefer to DIY your way to the perfect size? Here are two easy methods:

Other Ways to Measure Your Ring Size

1. Use a Ring You Own

  • Measure the internal diameter (in mm) of a ring that fits the desired finger.
  • Enter the number into our calculator or match it with our chart below.

2. Use a String or Paper Strip

  • Wrap a thin strip of paper or string around your finger.
  • Mark where the ends meet.
  • Measure the length in mm and input it into our calculator.
US Size UK Size Internal Diameter (mm) Finger Circumference (mm)
414.946.8
515.749.3
616.551.8
717.354.4
818.157.0
919.059.5
1019.862.1
1120.664.6
1221.467.2

Pro Tips for the Perfect Ring Fit

Getting your ring size just right can make all the difference in comfort and style. Here are some tried-and-true sizing tips to help you get the most accurate fit—especially useful when using our online ring size calculator:

1. Measure More Than Once

Your fingers can change size throughout the day due to temperature, hydration, and even hormones.

Tip: Measure your finger 2–3 times at different times of day (morning, afternoon, and evening) to get a consistent average. This helps eliminate sizing surprises later.

2. Consider Your Knuckle

If you have larger knuckles, the base of your finger may be narrower than the knuckle itself.

Tip: If the ring has to pass over a prominent knuckle, it’s a good idea to size up by half a size so it can slide on and off more comfortably—without being too loose once it’s on.

3. Wider Bands Feel Tighter

Chunky rings, statement pieces, or bands that are 5mm or wider tend to feel snugger because they cover more surface area on your finger.

Tip: For wide band rings, go up half a size for a better fit. Slim, stackable rings don’t require this adjustment.

4. Avoid Measuring Cold Fingers

Cold weather can shrink your fingers slightly, leading to a smaller-than-accurate size.

Tip: Always measure when your hands are warm—ideally at the end of the day, when your fingers are at their largest. This gives the most realistic sizing for all-day comfort.

5. Try a Ring You Already Own

Already have a ring that fits well on the intended finger?

Measure the inner diameter of that ring and enter it into our calculator—or match it to our size chart. It’s one of the easiest and most reliable ways to size up (literally!).

FAQs About Ring Sizing