Sia Ring - 4mm wide 3 Diamond, Moissanite or Sapphire Flush Set Flat Wedding BandSimple unisex wedding band with 3 flush set conflict free diamonds, moissanites, or sapphires on a 4mm flat wedding ring. It is a perfect band to wear alone or stack next to many engagement ring designs. Three 2. 5mm 0. 06ct mined diamonds (G H, SI2 SI3), lab grown diamonds (G H, SI1 SI2), lab created moissanites, or genuine white sapphires are set flush into the top of the band. Other gemstone options are available upon request. The ring is 4mm wide.