Choosing the correct size helps ensure your ARIN London piece feels comfortable and sits beautifully when worn.

The guidance below is intended to assist with selecting ring, bracelet, and necklace sizes before placing your order.

RING SIZE

Method One: Measure an Existing Ring

Place a ring that fits the intended finger on a flat surface and measure the inside diameter of the ring.

Match your measurement to the size chart below.

Method Two: Measure Your Finger

Wrap a thin strip of paper, string, or measuring tape around the base of your finger.

Mark where the ends meet and measure the length. This measurement represents your finger circumference.

Match your measurement to the size chart below.

Ring Size Chart

UK H / US 4 / EU 47
Diameter: 14.9 mm (0.59”)
Circumference: 47 mm (1.85”)

UK J / US 5 / EU 49
Diameter: 15.7 mm (0.62”)
Circumference: 49 mm (1.93”)

UK L / US 6 / EU 51
Diameter: 16.5 mm (0.65”)
Circumference: 51 mm (2.01”)

UK N / US 7 / EU 53
Diameter: 17.3 mm (0.68”)
Circumference: 53 mm (2.09”)

UK P / US 8 / EU 56
Diameter: 18.1 mm (0.71”)
Circumference: 56 mm (2.20”)

UK R / US 9 / EU 58
Diameter: 18.9 mm (0.74”)
Circumference: 58 mm (2.28”)

UK T / US 10 / EU 61
Diameter: 19.8 mm (0.78”)
Circumference: 61 mm (2.40”)

Ring Sizing Tips

• Fingers are often slightly larger at the end of the day and during warmer weather

• For the most accurate result, measure your finger in the evening

• Measure more than once to confirm accuracy

• If you are between sizes, we generally recommend selecting the larger size

• Finger size may vary between your left and right hand

• Many ARIN Classic Collection rings are adjustable. Please refer to the individual product description for details

BRACELET SIZE

Measure around your wrist using a flexible measuring tape or a strip of paper.

For a comfortable fit, add approximately 1–1.5 cm (0.4–0.6”) to your wrist measurement.

Bracelet Size Guide

Wrist under 13 cm (5.1”)
Recommended bracelet size: 14 cm (5.5”)

Wrist 13–15 cm (5.1–5.9”)
Recommended bracelet size: 15.3–18 cm (6–7”)

Wrist 15–17 cm (5.9–6.7”)
Recommended bracelet size: 18–20 cm (7–8”)

Wrist 17–19 cm (6.7–7.5”)
Recommended bracelet size: 20–23 cm (8–9”)

NECKLACE LENGTH GUIDE

40 cm (16”)

Sits close to the collar.

45 cm (18”)

Falls around the collarbone.

50 cm (20”)

Sits at the upper chest.

55 cm (22”)

Falls at mid-chest.

60 cm (24”)

Falls at the lower chest.

As necklace placement may vary depending on body shape, neck size, styling preference, and garment choice, these measurements are provided as a general guide only.

IMPORTANT

This Size Guide is provided as a general guide only. Actual fit may vary depending on individual measurements, body proportions, personal preference, and product design.

Customers are responsible for selecting their preferred size before placing an order. If you are unsure, please contact our Client Care team before purchasing.

For full sizing information, international size conversions, sizing recommendations, and our policy on returns, exchanges, bespoke, personalised, engraved, resized, and made-to-order jewellery, please refer to our  Size Guide and Returns, Refunds & Exchanges Policy.

STILL UNSURE?

Write to care@arinlondon.com. We'd rather spend a minute helping you get the size right than have you wearing a piece that doesn't sit as it should.