D-shape wedding rings are flat on the inside and rounded on the outside. Many people have D-shaped engagement ring profiles so it looks great if you opt for a wedding ring of the same shape. D-shapes are ideal for setting stones for diamond set wedding rings.
If you really are not sure with profile to go for, try our sample service, which allows you to try replica rings on before you buy them. For more information about the different metal alloys we sell, take a look at our metal guidance pages.