Most wedding bands are bought as an afterthought and worn every day for decades. The band has to sit against another ring, under a stone, without rubbing, catching or leaving a gap that bothers you every time you look at your hand. Here is what actually decides whether two rings work together.
Measure the engagement ring before you choose anything
Three measurements decide most of it. Get them from the jeweler who made the engagement ring, or ask us and we will work from photographs with a scale reference.
- Shank width at the base — usually 1.8 mm to 2.5 mm on an engagement ring
- Shank thickness — how deep the band is from inside to outside
- Head height — how far the setting rises above the top of the finger
Also note the profile: is the outside of the shank flat, domed, or knife-edged? A domed band against a flat band touches on a line; two domed bands touch on a narrower line still. That contact point is where wear shows first.
Straight or curved
Straight bands are the simplest and the most versatile. They fit flush against a low-set engagement ring or a ring with a flat gallery. Against a ring with a protruding head or a wide basket, a straight band leaves a visible gap at the top. Some people like that gap; it reads as two distinct rings. Others find it untidy.
Curved (contoured) bands are shaped to clear the engagement ring's head. A shallow curve — sometimes called a slight contour — clears a modest head and still looks close to a plain band when worn alone. A deep curve, or a "chevron", follows the shape of a pear or marquise head and reads as a fitted set.
The trade-off is real: a deeply curved band looks odd on its own, and if you ever wear it without the engagement ring it will look like a piece of a set rather than a ring. If you plan to wear the band alone sometimes, keep the curve shallow.
The gap question
A gap between rings is not a defect. It happens when the engagement ring's head overhangs the shank: the band meets the shank lower down and the stone leans out over it. The only ways to close a gap are to lower the head, to curve the band, or to build the band up with a raised section that meets the head — the last is structurally the weakest and we rarely recommend it.
If the gap bothers you, deal with it at the design stage of the engagement ring, not after. This is one reason we ask about wedding band plans during the first quote.
Shank height and thickness
People choose band width by eye and ignore thickness. Thickness is what keeps a ring round. A 1.6 mm thick band in 18K gold worn daily will oval within a few years; a 2.0 mm thick band holds its shape. For a band that will be worn every day for fifty years, we suggest 1.8 mm to 2.0 mm thick at the base and 2.0 mm to 2.5 mm wide.
Wider is not stronger. A very wide, thin band distorts more easily than a narrower, thicker one, and width beyond about 4 mm takes up more of the finger and can feel tight in summer.
Metal choice
Two rules matter more than the rest.
Match hardness where the rings touch. A platinum band against a white gold engagement ring will wear the white gold. Platinum is denser and harder-wearing; over years it slowly abrades the softer ring at the contact point. Two platinum rings wear against each other gracefully, as do two 18K gold rings. Mixed metals work, but expect the softer one to show wear first.
Match color if you want them to read as a set. 18K white gold and PT950 platinum look similar new and diverge over time: white gold's rhodium plating dulls to a warmer tone and needs re-plating, platinum develops a gray patina and keeps its color. Yellow and rose gold do not plate and do not change much.
Width ratios
There is no rule, but some proportions look settled. A band roughly half to two thirds the width of the engagement ring's shank reads as a pair. A band the same width reads as a matched set. A band noticeably wider than the engagement ring shank can overpower a delicate ring, and a much narrower band can look like an afterthought against a heavy one.
For a ring with a 2.0 mm shank, a 2.0 mm band is a matched set and a 1.5 mm band is a delicate companion. For a 2.5 mm shank, 1.8 mm to 2.0 mm is the sweet spot.
Sizing and the practical order
Order the band after the engagement ring is finished and sized, not before. Finger size changes, and a band that fits perfectly in winter can be tight in July. If both rings will be worn together, size the band to the same finger measurement as the engagement ring and expect the pair to feel slightly tighter than either alone.
Bands with stones set all the way around cannot be resized without rebuilding. If you want an eternity band, get the size right the first time — our warranty page explains the limits, and our custom page covers how a band is quoted alongside an engagement ring.