What if I am between sizes?

Go up for wide bands and for warm climates; go down for thin bands and if the knuckle is small.

Can the studio measure my finger from a photo?

No, fingers compress. It measures rings against a reference object; for a finger use the paper strip.

Can a full eternity ring be resized?

No. Get the size right in the model first; half eternities can be adjusted.

Jewellery, gold and diamonds

How to measure ring size at home

Ring size is an inner diameter in millimetres; everything else is a label. Measure a ring you already wear, or the finger, and convert. Kubikly uses the millimetres directly to scale a model.

Method 1: a ring you own

Lay it on a ruler and read the inner diameter across the widest point to the nearest 0.25 mm. Photograph it beside a coin or a ruler and the studio measures it for you.

Method 2: the finger

Wrap a strip of paper around the base of the finger, mark where it overlaps, measure the length: that is the circumference. Divide by 3.14 for the diameter. Measure in the evening, when fingers are largest, and add 0.5 mm for wide bands.

Method 3: a sizer

Plastic sizer sets cost a few dollars and are the most reliable for a surprise. Order one size up and down and note the knuckle.

Inner diameter	Circumference	US	UK	EU / ISO
15.7 mm	49.3 mm	5	J½	49
16.5 mm	51.9 mm	6	L½	52
17.3 mm	54.4 mm	7	N½	54
18.1 mm	57.0 mm	8	P½	57
19.0 mm	59.5 mm	9	R½	59
19.8 mm	62.1 mm	10	T½	62
20.6 mm	64.6 mm	11	V½	65

Why it changes the price

A size 9 band uses about 8% more metal than a size 6; a full eternity ring in size 9 takes three more stones than size 6. The model recomputes weight and stone count as you change the size, so the price follows.

Model a ring in your exact size

Frequently asked

What if I am between sizes?: Go up for wide bands and for warm climates; go down for thin bands and if the knuckle is small.
Can the studio measure my finger from a photo?: No, fingers compress. It measures rings against a reference object; for a finger use the paper strip.
Can a full eternity ring be resized?: No. Get the size right in the model first; half eternities can be adjusted.