Looking at diamonds on Blue Nile for an engagement ring. My girlfriend is petite and has small hands and fingers (size 4.5) so not sure if anything over 1.5ct will look ridicilous so should I just look for the highest clarity/color within my budget. I could get a 1.74ct G VS1 diamond or 1.54 F VS1 diamond for the same price. At what size typically does a diamond look gawdy on a small hand/finger.