Find her month's stone, check that it takes daily wear, then pick the gold and her size
Start with her month, then ask whether that stone can take a ring's knocks. Sapphire and ruby are hard enough to wear every day. Opal and emerald want a gentler hand and come off for the gym. If you do not know her month, go with opal, nearly half the rings bought here. Most of the gold rings are 14K, the harder alloy for a ring she never takes off.
Find your ring size in a minute
Size 6: 16.5 mm across, 51.9 mm around. It is the most bought size here: 21 of the 63 women's birthstone rings sold here in the past year with a size recorded. 51 of the 59 rings here list size 6.
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 women's ring size chart, 4 to 16
| US size | Inside diameter | Around the finger | Rings here listing it |
|---|
| 4 | 14.9 mm | 46.8 mm | 29 |
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| 4.5 | 15.3 mm | 48.0 mm | 32 |
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| 5 | 15.7 mm | 49.3 mm | 50 |
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| 5.5 | 16.1 mm | 50.6 mm | 47 |
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| 6 | 16.5 mm | 51.9 mm | 51 |
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| 6.5 | 16.9 mm | 53.1 mm | 48 |
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| 7 | 17.3 mm | 54.4 mm | 50 |
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| 7.5 | 17.7 mm | 55.7 mm | 47 |
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| 8 | 18.1 mm | 57.0 mm | 48 |
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| 8.5 | 18.5 mm | 58.2 mm | 27 |
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| 9 | 18.9 mm | 59.5 mm | 26 |
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| 9.5 | 19.4 mm | 60.8 mm | 11 |
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| 10 | 19.8 mm | 62.1 mm | 9 |
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| 10.5 | 20.2 mm | 63.3 mm | 5 |
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| 11 | 20.6 mm | 64.6 mm | 5 |
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| 11.5 | 21.0 mm | 65.9 mm | 2 |
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| 12 | 21.4 mm | 67.2 mm | 1 |
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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 on October 2, 2026; the sales lines are women's birthstone rings sold here in the year to September 26, 2026, with a size recorded.
Month by month: the birthstone for each month
January is garnet, February amethyst, March aquamarine and April diamond. May is emerald, June pearl or alexandrite, July ruby and August peridot. September is sapphire, October opal or tourmaline, November topaz or citrine, and December tanzanite or turquoise. Many jewelers give blue topaz to December as well. September's sapphire has the widest choice. April and August have no ring of their own, so for a diamond go to our women's diamond rings, and ask us about peridot.
Hard or soft: which birthstones hold up in an everyday ring
Sapphire and ruby hold up best. Jewelers rate hardness out of ten, with diamond at the top. Both sit at 9. Topaz, amethyst, citrine and garnet sit a step lower and wear well if she minds hard knocks. Emerald is hard enough but brittle, while opal and pearl are soft, so those come off for the gym and the sink. Most rings here hold the stone in prongs, so ask how high it sits.
Natural or lab-made: real, synthetic and lab-created birthstones
Only one title here says how its stone was made: the alexandrite solitaire is synthetic, grown in a lab. A grown stone has the makeup of a mined one, and only a gem lab tells them apart. The other titles do not say, though several descriptions call the stone natural. If it has to come out of the ground, ask us before you pay. An Emerald Cut Ruby is a ruby in a long step cut, never an emerald. The two pearl rings carry lab-grown diamonds in their halos.
The gold: 14K, 18K or sterling silver for a birthstone ring
Go with 14K gold for a ring she wears daily. It is tougher than 18K, and most of these rings are made in it. 18K marks sooner, and in yellow it runs a deeper color. Each gold ring comes in all three colors, yellow, white and rose. Rose gold flatters pink and purple stones, and white gold keeps a blue stone cool. Three rings are sterling silver, among them the opal pinky ring bought most. Silver darkens with air, so keep it in a pouch. More on karat is in the women's rings guide.
As a gift: her ring size, a mother's ring and returns
Measure a ring she already wears on the same finger, at a jeweler or with the sizer on this page. Most of the rings offer nine sizes, halves included. Four come in a single size, so read the listing first. A pinky ring runs small, so size that finger itself. For a mother's ring with a stone for each child, ask us about custom work. A resized ring, like a piece made for one person, is final sale. Other rings have fourteen days from delivery to come back unworn and unaltered. Before any return, start with customer service at service@traxnyc.com or 212-391-3832, and we send the return label it must travel on; for a resize, start on the live chat. Its cost and our five percent restocking fee come off the refund. A call or text to 212-872-9692 reaches the same desk, staffed from 10 AM ET.
Questions we get in the store
What is the birthstone for each month?
Garnet for January, amethyst for February, aquamarine for March and diamond for April. Emerald for May, pearl or alexandrite for June, ruby for July, peridot for August. Sapphire for September, opal or tourmaline for October, topaz or citrine for November, tanzanite or turquoise for December.
Which birthstone is best for a ring worn every day?
Sapphire or ruby, the hardest birthstones after diamond. Both rate 9 on the jeweler's hardness scale, so knocks rarely mark them. Topaz, amethyst and citrine wear well with some care, while opal, pearl and emerald should come off before rough work.
Are the stones in these birthstone rings natural or lab-made?
Nearly every title is silent on it, so ask us before you buy. The one title that does say is the alexandrite solitaire, which is synthetic, grown in a lab. Several descriptions call their stone natural, and the two pearl rings carry lab-grown diamonds.
More questions we get
Can I get a birthstone ring in white, yellow or rose gold?
Yes, every gold ring here lets you choose yellow, white or rose gold on the listing. The three sterling silver rings come in silver alone. Rose gold warms a pink or purple stone, and white gold suits the blues.
What ring size should I order for a birthstone ring gift?
Order the size of a ring she already wears on that finger, measured at a jeweler. Most listings here offer half sizes. A few come in a single size, so check the listing, and ask us about resizing before you order.
Is a birthstone ring a good gift for a mother?
Yes, and the classic mother's ring carries one stone for each of her children. Ask us for one as custom work. Every ring here holds one kind of colored stone, often beside diamonds, so each suits a gift for her own month.
Can a birthstone ring be an engagement ring?
Yes. Eleven rings here are made as engagement rings, most of them a single colored stone in prongs. All are 14K gold. For a ring worn for decades, the emerald-cut ruby holds up best, and any sapphire ring here is just as hard.
Can I return a birthstone ring?
Yes, for fourteen days from delivery, unworn and unaltered. Customer service clears a birthstone ring's return at service@traxnyc.com or 212-391-3832; it travels on our return label. Our refund policy subtracts that label and a five percent restocking fee, and resizing makes the sale final.