I ordered this 1mm yellow gold filled band in a size 6 it is true to size true yellow gold color when it is up against my real gold.
 1 mm is pretty thin, but dainty and feminine which is what I was looking for. time will tell if it is a true gold filled band. I get alot of complements. I also bought the 3mm gold filled band(from same seller), however it is Not a 3mm, it is a 2mm. I have gold bands in 1mm through 4mm  so I can compare the 2mm & 3mm that I had just bought and the 3 mm (that I paid $32 for, & it isn't even a 3mm, smh) it's definitely a 2 mm..  Also, I just  took it to a family friend who is a Gemologist, he measured the band, & it's definitely a 2mm.. Guess this would be what some people would call ''FALSE ADVERTISING'' here in America but The Seller is Charging people for a 3mm, but ur only getting a 2mm..... when in doubt measure yourself or take it to a jewelry store and have them measure it for you, also they can tell you if it's real gold filled...