Ring guard, 12Kt gold-filled, medium, fits 2.75mm to 5mm wide shanks. Sold individually. - Fire Mountain Gems and Beads

Use ring guards to tighten loose rings, preventing loss, without resizing. Ring guards clamp into the ring's shank and are tightened with a pair of pliers. They allow the ring to expand over the knuckle and fit snugly on the finger. To determine the size needed, measure the bottom width of the ring shank. Small size fits 2.5mm wide shanks, medium size fits 2.75mm to 5mm wide shanks, and large size fits 5mm wide shanks and over.

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Ring guard, 12Kt gold-filled, medium, fits 2.75mm to 5mm wide

Ring guard, 12Kt gold-filled, large, fits 5mm wide shanks and over

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Ring guard, 12Kt gold-filled, large, fits 5mm wide shanks and over