After much research I finally decided on a size for my eternity band. I''m going to be getting 7 pointers at 1.50 ctw. I feel this is the size that looks good both with my engagement ring and by itself. SP quoted me around $2200 for that. That price seems slightly lower than the ones listed on their website. I''m not sure why. My e-ring is a size 4.25 at around 2.5mm. The eternity band is going to be 2.9mm. Does this mean I should get a size 4.5? I''m worried about it being too loose or too tight.