How to Resize a Moissanite Ring: What's Possible, What's Not, and What to Expect

Ring sizing is one of the most common concerns for moissanite buyers, and for good reason. A ring that doesn't fit is a ring that doesn't get worn — and a ring that doesn't get worn is a ring that isn't doing its job. Whether you've received a ring that's slightly too large or too small, or whether your finger size has changed over time, understanding your options for resizing is important.

This guide covers everything you need to know about resizing a moissanite ring — which settings can be resized, how much, what the process involves, and what to do when resizing isn't possible.

The Good News: Most Moissanite Rings Can Be Resized

The moissanite stone itself is not affected by the resizing process. Silicon carbide at Mohs 9.25 is thermally stable and chemically inert — the heat and chemicals involved in ring resizing do not affect the stone's color, clarity, or optical performance. The stone that goes into the resizing process comes out exactly as it went in.

The question of whether a ring can be resized is therefore entirely about the setting — specifically, the band's design and the placement of any stones in the band.

Settings That Can Be Resized

Simple Solitaire Bands

A simple solitaire setting — a center stone on a plain band with no stones in the band itself — is the easiest ring to resize. The jeweler can add metal to the band (to make it larger) or remove metal from the band (to make it smaller) without affecting the center stone or any other design element. Most solitaire rings can be resized up or down by 1–2 sizes without any significant impact on the ring's appearance or structural integrity.

Three-Stone Settings

Three-stone settings can generally be resized, though the process is slightly more complex than a simple solitaire because the jeweler must work around the side stones. Most three-stone rings can be resized by 1–1.5 sizes in either direction without difficulty.

Halo Settings with Plain Bands

Halo settings with plain bands (no stones in the band) can be resized similarly to solitaires. The halo itself is not affected by the resizing process, as the work is done on the band below the setting.

Settings That Are Difficult or Impossible to Resize

Full Eternity Bands

Full eternity bands — rings with stones set continuously around the entire circumference of the band — are the most difficult rings to resize. Because stones run all the way around the band, there is no plain metal section where the jeweler can add or remove metal without affecting the stone placement. Resizing a full eternity band typically requires removing stones, adjusting the band, and resetting the stones — a complex and expensive process that may not be possible for all designs.

This is why accurate sizing is especially important for full eternity bands. For guidance on getting your size right, see our Ring Size Guide.

Heavily Paved Bands

Bands with extensive pave stone coverage are similarly difficult to resize, because the pave stones limit the jeweler's ability to work on the band without disturbing the stone placement. Minor resizing (half a size or less) may be possible; significant resizing is generally not.

Very Thin Bands

Very thin bands (under 1.5mm) can be structurally compromised by resizing, particularly if the ring needs to be made significantly larger. Adding metal to a very thin band can create a visible seam or a structural weakness at the join point. For very thin bands, it is better to get the size right at the time of purchase than to rely on resizing.

How Much Can a Ring Be Resized?

As a general rule, most rings can be resized by up to 2 sizes in either direction without significant impact on the ring's appearance or structural integrity. Beyond 2 sizes, the resizing process becomes more complex and the risk of visible changes to the ring's proportions increases.

For rings that need to be resized by more than 2 sizes, the most practical solution is often to have a new band made rather than to resize the existing one. The center stone can be reset into the new band, preserving the stone while replacing the setting.

The Resizing Process

Ring resizing is performed by a qualified jeweler and typically takes 1–2 weeks. The process for making a ring larger involves cutting the band, inserting a piece of metal of the appropriate size, and soldering the join. The process for making a ring smaller involves cutting out a section of the band and soldering the ends together. In both cases, the join is then polished to be invisible.

For plated rings, resizing will typically remove the plating at the join point, which will need to be re-plated after the resize. This is a routine service that any jeweler can perform.

What to Do If Your Ring Doesn't Fit

If you've received a ring that doesn't fit, here are your options in order of preference:

1. Contact us first. If the ring is new and the size is significantly wrong, contact our team. We may be able to help with an exchange or a resizing solution before you take the ring to a local jeweler.
2. Take it to a local jeweler for resizing. Most local jewelers can resize a moissanite ring. The moissanite stone is not affected by the resizing process, so you can use any qualified jeweler you trust.
3. Consider the Lifetime Upgrade Program. If the ring needs significant modification — more than a simple resize — our Lifetime Upgrade Program allows you to apply the value of the original ring toward a new ring in the correct size and setting.

Preventing Sizing Problems: Getting It Right the First Time

The best approach to ring sizing is to get it right before you order. Our Ring Size Guide covers how to measure your ring size accurately at home, including the best time of day to measure (fingers are slightly larger in the evening and in warm weather) and how to account for different band widths (wider bands fit more snugly and may require a half-size larger than your usual size).

If you're buying a ring as a surprise and don't know the recipient's size, see our article on how to find her ring size without ruining the surprise. When in doubt, order slightly larger — it is easier to size a ring down than to size it up, and a ring that is slightly too large can be worn temporarily while the resize is arranged.

📀 Not sure of your size? View our Ring Size Guide & Jewelry Care Tips