Diamond Stud Earrings Size Guide: Carat Sizes in mm

Diamond stud earrings are the one piece of jewelry almost everyone wears. This diamond stud earrings size guide shows how big each carat size really is, so you can choose studs that look right on you.

Quick answer: for everyday wear, most people choose studs of 0.50 to 1.00 carat each. For a bolder statement, go for 1.50 to 2.00 carats each.

First: What Does Total Carat Weight Mean?

Stud earrings are often sold by total carat weight (ctw), which adds both earrings together. So 1 ctw means two stones of about 0.50 carat each, not two 1 carat stones. Always check whether the listed weight is per stone or for the pair.

Stud Size Chart (Round, Per Stone)

Carat per stone	Approx. diameter	Look
0.25 ct	4.1 mm	Delicate, great for second piercings
0.50 ct	5.2 mm	Classic everyday size
0.75 ct	5.8 mm	Noticeable but refined
1.00 ct	6.5 mm	Elegant statement
1.50 ct	7.4 mm	Bold
2.00 ct	8.1 mm	Very bold

Sizes are approximate for well-cut round stones. See more shapes on our diamond size chart.

Shown: Round Brilliant Cut Moissanite Classic Solitaire Stud Earrings

Tips for Choosing Stud Size

Small earlobes: 0.25 to 0.75 carat each looks balanced.
Everyday office wear: 0.50 to 1.00 carat each.
Weddings and events: 1.00 carat each and above.
Try a paper test: draw circles of each diameter, cut them out and hold them to your ear in a mirror.

Backs and Settings

Screw backs are the most secure and ideal for larger stones.
Push backs are quick and comfortable for everyday wear.
Four-prong settings show more stone; bezel settings feel smooth and protect the edges.

Shop lab grown diamond earrings, including our Oval Solitaire Studs, and moissanite stud earrings.

Shop Solitaire Stud Earrings

Cushion cut lab grown diamond solitaire stud earrings

Cushion Lab Diamond Studs

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Pear Lab Diamond Studs

Heart shape lab grown diamond stud earrings

Heart Lab Diamond Studs

Asscher cut lab grown diamond solitaire stud earrings

Asscher Lab Diamond Studs

Round cut lab grown diamond cluster stud earrings with curved design

Round Cluster Curved Studs

Emerald Moissanite Studs

Swipe to see more → | View all earrings

Frequently Asked Questions

What is the most popular stud earring size?

About 1 carat total weight (0.50 carat each) is one of the most popular everyday choices.

Do other shapes look bigger than round?

Yes. Oval and pear studs look larger than round studs of the same carat weight.

Author Bio

Aumsri Pradhan

Founder, Ivevar Luxury

Aumsri Pradhan leads Ivevar Luxury, a Surat-based brand that handcrafts lab grown diamond and moissanite jewelry in its own workshop, and shares practical buying guidance on the Ivevar blog. View author profile ›

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