The words "signet ring" have become synonymous with the small gold ring worn on a gentleman's little finger. Generally speaking a signet ring is engraved with either the arms, crest, or initials (usually a monogram) of the owner. Most rings are made of gold although silver and platinum signets are also, albeit rarely, encountered. Likewise, larger rings bearing the arms, crest, or initials of the owner are also seen. These are usually worn on the middle or ring finger and while undoubtedly signet rings, they are largely out of fashion today.

Generally the signet ring in worn on the little finger of the left hand by right handed gentlemen, and on the little finger of the right hand by left handed gentlemen. The reason for this is to prevent the ring interfering with the writing hand when signing one's name.

Under no circumstances should a clansman's badge be used on a signet ring, as this would imply that the ring is the property of the chief! Clansmen who lack arms should have their initials seal engraved as a monogram on a signet ring if they choose to wear one.

Broadly speaking there are no "rules" regarding the wearing or use of a signet ring, although in practice a gentleman only wears two rings: a signet ring and (if married) a wedding band. The wearing of more than two rings is thought to be either ostentatious or down right vulgar.