Learn the cut, then pick the setting, the carat and grades, the stone and her size
Every ring here holds an emerald cut diamond, a long rectangle with flat, stepped facets, not the green emerald stone. That open face lets you see into a diamond, so buy clarity before carat. Start near two to three carats, where most centers here sit. Grown or mined, the center is hers to choose. Pick the setting she will wear every day, and read her size from a ring she owns.
Find your ring size in a minute
Size 5: 15.7 mm across, 49.3 mm around. 19 of the 22 rings here list size 5.
Between two sizes? Take the one that passes the knuckle and sits snug below it. A wide band, 8 mm and up, fits tighter, so go up a half size. Measure at the end of the day, at room temperature.
Text this size to the desk
The engagement ring size chart, 4 to 16
| US size | Inside diameter | Around the finger | Rings here listing it |
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| 4 | 14.9 mm | 46.8 mm | 9 |
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| 4.5 | 15.3 mm | 48.0 mm | 9 |
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| 5 | 15.7 mm | 49.3 mm | 19 |
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| 5.5 | 16.1 mm | 50.6 mm | 18 |
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| 6 | 16.5 mm | 51.9 mm | 18 |
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| 6.5 | 16.9 mm | 53.1 mm | 19 |
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| 7 | 17.3 mm | 54.4 mm | 18 |
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| 7.5 | 17.7 mm | 55.7 mm | 17 |
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| 8 | 18.1 mm | 57.0 mm | 17 |
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| 8.5 | 18.5 mm | 58.2 mm | 15 |
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| 9 | 18.9 mm | 59.5 mm | 14 |
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| 9.5 | 19.4 mm | 60.8 mm | 4 |
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| 10 | 19.8 mm | 62.1 mm | 3 |
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| 10.5 | 20.2 mm | 63.3 mm | 0 |
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| 11 | 20.6 mm | 64.6 mm | 0 |
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| 11.5 | 21.0 mm | 65.9 mm | 0 |
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| 12 | 21.4 mm | 67.2 mm | 0 |
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| 12.5 | 21.8 mm | 68.5 mm | 0 |
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| 13 | 22.2 mm | 69.7 mm | 0 |
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| 13.5 | 22.6 mm | 71.0 mm | 0 |
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| 14 | 23.0 mm | 72.3 mm | 0 |
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| 14.5 | 23.4 mm | 73.6 mm | 0 |
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| 15 | 23.8 mm | 74.8 mm | 0 |
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| 15.5 | 24.2 mm | 76.1 mm | 0 |
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| 16 | 24.6 mm | 77.4 mm | 0 |
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A screen measurement checked with a quarter is a guide, good to about a half size; the desk sizes you right the first time. "Rings here listing it" counts the live listings.
The emerald cut: what an emerald cut diamond is, and why it is not a green stone
Emerald cut names a shape, not the green stone. It is a diamond cut as a rectangle with trimmed corners, its facets laid in long flat steps. The steps give wide flashes of light instead of sparkle, and the open top lets you look into the stone. A classic one runs about one and a half times as long as it is wide. It faces up about as big as a round of the same weight and makes her finger look longer.
The settings: emerald cut solitaire, side stone and toi et moi rings
Decide how much the stone should stand alone. At one end, the Clara lines its center up with emerald and baguette side stones, five in a row; at the other, the Lumiere holds one stone on claws over a thin pave band. Plain solitaires on claws keep the step cut clean, and the Toi et Moi rings pair an emerald cut with a pear. Look for metal over all four corners, where a step cut chips first.
Carat and clarity: what carat emerald cut diamond, and the grades that show
Start between two and three carats; the table shows which rings hold each weight. On our diamond size chart, two carats is about 9 by 6 mm and three about 10 by 7. The open steps hide little, so stay at VS clarity or better and keep the color high. Every white center that states a grade reads D to F and VS or better, and one center is a fancy vivid blue.
Stone and metal: lab-grown or natural, in 14K, 18K or platinum
Grown or mined is her call. Lab-grown and natural diamonds of the same grade look the same; a natural diamond costs more. We don't sell diamonds as an investment, and resale value isn't guaranteed for either. The one natural center here sits in an 18K ring, and two rings are platinum. Nearly every ring comes in yellow and white gold, most in rose too. White gold or platinum keeps a colorless stone looking white.
Her size and returns: emerald cut ring sizes, resizing and returns
Order the size she wears. Check a ring from her ring finger against the sizer on this page or our ring size chart. Most rings here run in half sizes 5 to 8, many to 9, and three come in a single size. A ready-made ring can return within fourteen calendar days of delivery, unworn, with all its original packaging, and unaltered. Clear it with customer service first (service@traxnyc.com or 212-391-3832); it ships only on our return label. The 5 percent restocking fee, the original shipping charge and the return shipping come off the refund. Made-to-order, resized or changed rings are final, by the refund policy. Not sure which yours is? Start on the live chat, or call or text 212-872-9692 from 10 AM ET.