Wedding ring guide
Ring Width Guide
Ring width changes fit, comfort, and appearance.

Ring width changes fit, comfort, and appearance.
Narrow bands, around 2 to 3 millimeters, feel light and show a stone well. Medium bands, around 4 to 5 millimeters, are a common everyday choice. Wide bands, 6 millimeters and up, feel substantial and usually need a slightly larger size.
Measure with the actual width you plan to buy, because a wide band sample will not predict a narrow band fit.