An elongated diamond engagement ring with a curved wedding band. Anna P. Jay One of the most eye-catching designs is the $2,400 Lucy Wave band from the San Diego-based company Marrow Fine.

Wedding bands come in different widths, usually between 5 to 10 millimeters. Smaller widths are subtle, while larger ones are bold and heavy. The most popular widths are 7 and 8 millimeters.