Here you can select your preferred thickness for your ring.
Thin bands are very trendy however it should be worth noting that gold is a bendable metal and going 'too thin' can result in warping of the band shape over time through daily wear.
That said, the thinnest option I am willing to offer for a plain band is 1.5 mm however I always recommend 1.7 mm as the thinnest option in both plain and pavé band styles. This is still very dainty and thin just with a little more support for such a fine piece of jewellery that one would wear daily on a finger.
Recommended width by style:
Athena, Juno, Petal, Clio, Venus : 1.7 mm
Hera, Shera, Cupid, Diana- 2 - 2.3 mm