The ring I'm looking to buy is 6.7 mm at top at baguettes 4.7mm in middle and 3.5 mm on bottom. What would be considered average or the middle road for width? My gf does not like thin bands but is this too thick? Where can you find something to measure in metric? She has a ring that she wears and she told me that she would want the ring to be .75 to .5 the width and I have to measure it. fyi my g/f ring size is 6.5. The measurements of the ring are 6.54x 6.58x 4.06.