It also depends on one's personal preferences, whether a couple wants a thick band or a thin one. Usually, in a couple, the man prefers a thick band, and the woman chooses to go with a thick one like the 2mm gold wedding band.
If you're opting for the 2mm wedding band, make sure to choose yellow gold, as it has extra strength and durability as compared to other gold counterparts. Thinner bands are usually the best, as it doesn't take much space and is comfortable to wear.
Thick bands, however, covering more surface causes much discomfort. In order to have a classic look and be stylish then, getting a thin band would be the perfect option, narrow bands can accommodate small diamonds and stones to enhance the face of the wedding set and match your outfit.