Hi there, first post after looking on quite a few threads. I''m buying an engagement ring and I''ve looked around and found the diamond i''m looking for on bluenile (a .47 Ideal I SI1) and i''m debating a 2mm band with channel sidestones and a 3mm band with channel sidestones. She is a bigger lady and has a size 7.5 finger, i''ve heard 2mm would simply be too small on a 7.5 but we both prefer the look of the 2mm. the 3mm is fine, the 2mm is just better, and also happens to be cheaper. Is it too small? Would it make any difference if it was complimented by a 2.5mm band instead of a 2mm band? Thanks for your input.