Harmonic Jewels

Jewellery Size Guide (USA)

Finding the right fit ensures your jewellery is comfortable, secure, and looks just right. Use our guide below to determine your ring, bracelet, and necklace sizes.

Ring Size Guide (USA Standard)

  • Measure at the end of the day when your fingers are largest.
  • Ensure your finger is at normal body temperature (cold fingers shrink, hot fingers expand).
  • Your ring should slide on easily but resist slightly when coming off over the knuckle.
USA Size Inside Diameter (mm) Inside Circumference (mm)
4 14.8 mm 46.5 mm
5 15.7 mm 49.3 mm
6 16.5 mm 51.9 mm
7 17.3 mm 54.4 mm
8 18.1 mm 57.0 mm
9 18.9 mm 59.5 mm
10 19.8 mm 62.1 mm
11 20.6 mm 64.6 mm
12 21.4 mm 67.2 mm

Tip: If you are between two sizes, we recommend going for the larger size for comfort.

Bracelet Size Guide (USA Standard)

  • Use a flexible measuring tape (or a strip of paper) to wrap around your wrist, just below the wrist bone.
  • Add 0.5" to 1" (1.25–2.5 cm) to your wrist measurement for comfort, depending on how you like your bracelet to fit (snug, comfort-fit, or loose).
Wrist Size (inches) Suggested Bracelet Size Fit Type
5.5 - 6.0 6.5" Snug
6.0 - 6.5 7.0" Comfort
6.5 - 7.0 7.5" Comfort
7.0 - 7.5 8.0" Loose
7.5 - 8.0 8.5" Loose

Tip: For bangles, size up slightly since they must slide over the widest part of your hand.

Necklace Size Guide (USA Standard)

Necklaces are measured in inches, and the length determines how they fall on your chest.

Length (inches) Style / Placement Best For
14" Collar Very close to the neck (choker look)
16" Choker Rests at the base of the neck
18" Princess Classic length, falls at collarbone
20" Matinee Falls just below collarbone
22–24" Matinee Long Falls at or above neckline
28–36" Opera Long, below bust line
36" + Rope Very long, can be doubled or styled

Tip: Consider your neck size, height, and outfit neckline when choosing necklace length.

Quick Tips

  • Measure twice to be sure.
  • If buying as a gift, check the recipient’s jewellery box for size clues.
  • Our team is happy to assist with size adjustments on request.
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