Secret Ring SizeWide bands
Wide band ring size: how much to size up
A band 6 mm or wider usually needs half a size up from your measured size, because it covers more of the finger and fits tighter. Under 6 mm, order the size you measured.
Your measurement and the band
Right on a size.
Screens, paper and string can be off by a little. Before you order, tell the jeweler how you measured and ask about resizing.
Why wide bands fit tighter
A wide band touches more of the finger, so it meets the knuckle sooner and leaves less room for the finger to swell. Many jewelers suggest half a size up from 6 mm and, for very wide bands, trying the ring on, since some people need a full size.
Worked example: a finger that measures 60 mm around is a US 9½. For an 8 mm band, the tool gives US 10, half a size up, and suggests trying it on. A thin 2 mm band in the same size stays at US 9½.
Wide bands are common in men's rings: see the men's ring size chart. If a ring you already own is too big or small, see how many sizes it needs.
Questions
Do you go up a size for a wide band?
Usually half a size for bands 6 mm or wider. For 8 mm and wider, try the ring on if you can; some people need a full size.
Is a comfort-fit band different?
A comfort-fit band is rounded inside and slides over the knuckle more easily, so it may fit like half a size larger. Ask the jeweler whether their chart already allows for it.
What if my ring is too big?
A jeweler can resize most metal bands, or fit sizing beads or a spring insert to stop it from spinning.
How wide is a typical wedding band?
Women's bands are often 2 to 4 mm and men's 5 to 8 mm, but any width is sold. Measure the band or check the listing.