The Nicholas Wedding Band is the thickest band we make with a width of 6.5mm. The ring is solid 14k and comes in white, rose and yellow gold. Additional metals available upon request. The original Nicholas band has a 2.4mm profile for clients that are hard on their jewelry. (I am one of those people...we don't judge!!) The ultrathin version of the band has a profile of 1.6mm. Ultrathin is typically recommended for customers that don't work with their hands or customers with a ring size 9 and below.