Lab-Grown Diamond Wedding Bands

Coverage: full eternity, half eternity and three-quarter lab-grown diamond bands

Coverage comes first, because it decides both the fit and the sizing. A full eternity band shows diamonds at any turn. A half or three-quarter band stops short, leaving plain gold under the finger that sits easier beside other rings. Ten wedding and row bands here never say how far round their stones run, so ask. For an engagement ring set low, the curved Odette nests against the center stone, and the Stella open ring leaves a 4 mm gap for it. Full eternity bands took about six in ten pieces sold in the year.

Sizing: lab-grown eternity band sizes, one-size bands and resizing

Stones set the whole way round leave no bare gold for a jeweler to cut, so a full eternity band cannot be resized. Six of the 11 here are made in one size only, between 4.5 and 7.5. If hers is missing, ask the live chat whether that band can be made for her finger. Most other bands offer every half size from 5 to 8. Match her engagement ring size, since both share one finger, and check a ring she wears there against our ring size chart.

Carats and grades: total carat weight, color and clarity of lab-grown diamonds

A band's carat figure adds up all its stones, never one diamond. Each listing prints that sum, from a quarter carat to five, and nearly all stay at 3 carats or under. About seven in ten pieces sold in the year held one to three carats. Where a listing names the grade, color runs E to G and clarity VS to VVS, colorless or nearly so, and clean to the eye. Grown or mined, every diamond is graded on that one scale.

Gold: 14K, 18K or platinum lab-grown wedding bands

For daily wear, 14K is the tougher gold, harder than 18K and better at taking knocks. Two bands in three here are 14K. Ten are 18K and two platinum. Nearly every band comes in yellow or white gold and most in rose, so follow her engagement ring. The middle 14K band here weighs about two and a half grams. Of the 13 listings that print a width, about half run 1.6 to 2.5 mm.

Buying: ready to ship or made for her, shipping and returns on a lab-grown band

Before you pay, ask the live chat whether the band is ready in her size or must be made. One in stock normally leaves us inside two to five business days, tracked. Unworn and unaltered, it can come back within fourteen days of confirmed delivery once customer service clears the return at service@traxnyc.com or 212-391-3832. It travels back only on our return label, and the refund drops the return shipping plus five percent for restocking. A resized band, or one made for her alone, is final sale. For a size that is not listed, write to the live chat, or call or text 212-872-9692 from 10 AM ET.