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When you shop for lab grown diamond stud earrings, the carat weight shown is usually the total for the pair. A 1 carat pair holds two half carat diamonds of about 5.2 mm each, and a 2 carat pair holds two 1 carat diamonds of about 6.5 mm each. For a first pair worn every day, 1 to 1.5 carats total is an easy size to live with; 2 carats and above is a clear statement.
This guide shows how big each size looks, how 1 carat and 2 carat studs compare, and how to choose the shape, backs and metal.
| Pair total (TCW) | Each earring | Round stud | Emerald cut stud | Look on the ear |
|---|---|---|---|---|
| 0.5 ct | 0.25 ct | 4.1 mm | 4.4 × 3.1 mm | Small and subtle |
| 1 ct | 0.50 ct | 5.2 mm | 5.6 × 4.0 mm | Classic everyday size |
| 1.5 ct | 0.75 ct | 5.9 mm | 6.4 × 4.5 mm | Noticeable, still everyday |
| 2 ct | 1.00 ct | 6.5 mm | 7.0 × 5.0 mm | Clearly visible |
| 3 ct | 1.50 ct | 7.4 mm | 8.0 × 5.7 mm | Bold |
| 4 ct | 2.00 ct | 8.2 mm | 8.8 × 6.3 mm | Statement |
| 5 ct | 2.50 ct | 8.8 mm | 9.5 × 6.8 mm | Statement |
Millimeter figures are for well proportioned stones and individual stones vary a little. To see any size on an ear lobe at true scale, use our stud size on the ear calculator.
A 1 carat pair is two diamonds of about 5.2 mm. They sit neatly on the lobe, go with jeans as easily as an evening dress, and make a good first pair or a gift for someone who wears small jewelry.
A 2 carat pair is two 1 carat diamonds of about 6.5 mm, roughly a quarter wider than a 1 carat pair. That extra width is easy to see across a room, so a 2 carat pair feels like a real upgrade for someone who already owns small studs. Because each earring holds a diamond of 1 carat, each stone also comes with an IGI report.
The size of the ear lobe matters too. On a small lobe a 6.5 mm stud covers more of the lobe and looks larger. If you are unsure, 1.5 carats total, two stones of about 5.9 mm, sits in between.
At the same carat weight, a cushion looks a little smaller face up than a round: a 1 carat cushion is about 5.5 mm square, against 6.5 mm for a 1 carat round. An emerald cut looks longer and narrower.
Push backs slide onto the post and are quick to put on and take off. Screw backs thread onto the post, so they take a few seconds longer but hold more securely, which many people prefer for larger stones and for studs worn every day. Our four prong studs and blue halo studs have screw backs, and our cushion cut studs have push backs. Each product page lists its back.
Most of our studs are made in 9K, 14K or 18K solid gold in white, yellow or rose, in platinum and in 925 sterling silver; each product page lists its metals. White gold and platinum make white diamonds look crisp and bright. Yellow and rose gold add warmth and suit someone who already wears warm metals. If you cannot tell, look at the jewelry she wears most and match it.
Our white stud earrings use lab grown diamonds graded D-E-F (colorless), VVS-VS clarity and Excellent cut. They are real diamonds, grown with CVD technology, with the same hardness and sparkle as mined diamonds.
Every gold pair comes with an SGL jewelry certificate and every platinum pair with an ITPL certificate. When each earring holds a lab grown diamond of 1 carat or more, which means pairs of 2 carats total and above, those stones also come with an IGI report. Every piece has a lifetime warranty on manufacturing defects. If a stone comes loose because of a manufacturing fault, we reset or replace it free under our lifetime warranty. A stone lost through a knock or everyday wear can be replaced as a paid repair, and we always quote first.
Every pair is made to order in your metal and carat weight and set by hand in Surat, which takes 10 days. Free standard shipping takes about 15 days after dispatch and express shipping ($35) up to 10 days, both insured and tracked. For Valentine's Day, order by January 17 with standard shipping or January 22 with express (US Eastern time). Studs need no ring size, so they are one of the easiest gifts to keep secret. You will find more ideas in our Valentine's Day jewelry collection.
See every pair in our lab grown diamond stud earrings, or browse all lab grown diamond earrings, including hoops and drops. To picture a size before you choose, open the stud size calculator.
For stud earrings the carat weight is almost always the total for the pair, written as TCW (total carat weight). A 2 carat pair holds two 1 carat diamonds, one in each earring.
A 1 carat pair of round studs holds two half carat diamonds of about 5.2 mm each. If you mean 1 carat in each earring, a 2 carat pair, each round diamond measures about 6.5 mm across.
For a first pair worn every day, 1 to 1.5 carats total is an easy size. Choose 2 carats total and above if you want the studs to be noticed, or if she already owns a smaller pair.
Every Ronora gold pair comes with an SGL jewelry certificate and every platinum pair with an ITPL certificate. Pairs of 2 carats total and above have 1 carat or more in each earring, and those stones also come with an IGI report.
Yes. Lab grown diamonds are real diamonds, made of the same carbon crystal as mined diamonds, with the same hardness and sparkle. Ours are grown with CVD technology and our white diamonds are graded D-E-F (colorless), VVS-VS clarity and Excellent cut.
Screw backs hold more securely, which is why many people choose them for larger studs or for earrings worn every day. Push backs are quicker to put on. Each of our product pages lists the back for that pair.
