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Birthstone Collection

Your birth month, your style.

Our Birthstone Collection brings a pop of color and meaning to your everyday ring. Each one is inspired by the gemstone of the month — like garnet for January, amethyst for February, and turquoise for December.

Whether you’re wearing your own birthstone, stacking your loved ones’ months, or just vibing with a color you love, these rings are all about personal expression. And because they’re made from soft, breathable silicone, they’re as comfy as they are meaningful.

Choose from our signature Arc, Dual Layer, and Stacklet ring styles — and make it your own with custom engraving inside.

Meaningful, giftable, and made to move with you.

27 products

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Peridot Green Breathable Silicone Ring For Women - Knot Theory
Sale price $22.99 Regular price$29.99 USD
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Amethyst Purple Breathable Pearly Silicone Ring for Women - Knot Theory
Sale price $22.99 Regular price$29.99 USD
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Amethyst Purple Dual Layer Breathable Silicone Ring
Sale price $24.99 Regular price$29.99 USD
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Cosmic Purple Braided Silicone Ring - Stackable Thin Band
Sale price $14.99 Regular price$19.99 USD
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Cosmic Purple Breathable Silicone Ring for Women and Men - Knot Theory
Sale price $24.99 Regular price$32.99 USD
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Cosmic Purple Dual Layer Breathable Silicone Ring
Sale price $24.99 Regular price$29.99 USD
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Pearl Green Breathable Silicone Ring for Women - Knot Theory
Sale price $22.99 Regular price$29.99 USD
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Emerald Dual Layer Breathable Silicone Ring
Sale price $24.99 Regular price$29.99 USD
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Pearl Aquamarine Breathable Silicone Ring for Women - Knot Theory
Sale price $22.99 Regular price$29.99 USD
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Blue Sky Dual Layer Breathable Silicone Ring
Sale price $24.99 Regular price$29.99 USD
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Satin Chrome Red Breathable Silicone Ring for Men and Women - Knot Theory
Sale price $22.99 Regular price$29.99 USD
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Metallic Red Dual Layer Breathable Silicone Ring - Knot Theory
Sale price $24.99 Regular price$29.99 USD
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Pearl White Braided Silicone Ring - Stackable Thin Band
Sale price $14.99 Regular price$19.99 USD
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Pearl White Breathable Silicone Ring For Men and Women - Knot Theory
Sale price $22.99 Regular price$24.99 USD
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Pearl White Pyramid Stackable Slim Thin Silicone Ring for Women - Knot Theory
Sale price $14.99 Regular price$19.99 USD
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Silver Braided Slim Silicone Ring, Stackable Thin Band

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Sale price $14.99 Regular price$19.99 USD
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White Dual Layer Breathable Silicone Ring
Sale price $24.99 Regular price$29.99 USD
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Smooth Silver Breathable Silicone Ring For Men and Women - Knot Theory
Sale price $22.99 Regular price$24.99 USD
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Smooth Silver Dual Layer Breathable Silicone Ring
Sale price $24.99 Regular price$29.99 USD
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Metallic Blue Breathable Silicone Ring For Men and Women - Knot Theory
Sale price $22.99 Regular price$29.99 USD
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Metallic Blue Sapphire Pyramid Stackable Slim Thin Silicone Ring for Women - Knot Theory
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Sapphire Blue Braided Silicone Ring - Stackable Thin Band
Sale price $14.99 Regular price$19.99 USD
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Metallic Blue Dual Layer Breathable Silicone Ring - Knot Theory
Sale price $24.99 Regular price$29.99 USD
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Metallic Fuchsia Breathable Silicone Ring for Women - Knot Theory
Sale price $22.99 Regular price$29.99 USD
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