I ordered this 3 mm plain yellow gold filled band 2 replace a gold color stainless steel band that was 3 mm However this new 3 mm band that I received today is definitely not a 3 mm it is definitely a to me because I have a 3 mm rings and 2 mm rings and 1 millimeter rings to compare and it is definitely a 2 mm not a 3 mm as in this description.. with that being said now that I know it is a 2 mm and not a 3 mm band I am hoping now that it is a true gold filled ring but I guess time will tell. But it is very feminine and almost dainty looking..