Halo Engagement Rings

Gemini toi et moi two stone ring with two pink sapphires pinched on finger

Gemini two stone toi et moi ring with pink sapphires pinched on fingers

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Ring Size Conversion Guide

Finding your perfect fit is all about the little details. Our ring size chart offers the closest size conversions to help you choose with confidence. If you're between sizes, we recommend going up ¼ size for a little extra comfort or down ¼ size for a snugger feel. After all, your favorite sparkle should feel just as lovely as it looks✨

US/Canada	Inside Diameter (mm)	Inside Circumference (mm)
3	14.05mm	44.14mm
3 1/4	14.25mm	44.77mm
3 1/2	14.45mm	45.40mm
3 3/4	14.65mm	46.02mm
4	14.86mm	46.68mm
4 1/4	15.04mm	47.25mm
4 1/2	15.27mm	47.97mm
4 3/4	15.53mm	48.79mm
5	15.70mm	49.32mm
5 1/4	15.90mm	49.95mm
5 1/2	16.10mm	50.58mm
5 3/4	16.30mm	51.21mm
6	16.51mm	51.87mm
6 1/4	16.71mm	52.50mm
6 1/2	16.92mm	53.16mm
6 3/4	17.13mm	53.82mm
7	17.35mm	54.51mm
7 1/4	17.45mm	54.82mm
7 1/2	17.75mm	55.76mm
7 3/4	17.97mm	56.45mm
8	18.19mm	57.15mm
8 1/4	18.35mm	57.65mm
8 1/2	18.53mm	58.21mm
8 3/4	18.69mm	58.72mm
9	18.89mm	59.34mm
9 1/4	19.22mm	60.38mm
9 1/2	19.41mm	60.98mm
9 3/4	19.62mm	61.64mm
10	19.84mm	62.33mm
10 1/4	20.02mm	62.89mm
10 1/2	20.20mm	63.46mm
10 3/4	20.44mm	64.21mm
11	20.68mm	64.97mm
11 1/4	20.85mm	65.50mm
11 1/2	21.08mm	66.22mm
11 3/4	21.24mm	66.73mm
12	21.49mm	67.51mm
12 1/4	21.69mm	68.14mm
12 1/2	21.89mm	68.77mm
12 3/4	22.10mm	69.43mm
13	22.33mm	70.15mm