I'm looking to buy a 16" strand of pearls with pearl stud earrings. What brand should I go with? Also I for sure going with a 7.5 mm stud but I can't decide if I should go with the 7 x 7.5 mm or 7.5 x 8 mm strand. I've only looked at mikimoto's pearls and I would be getting the A+ quality. I haven't gotton a chance to look at Tiffany's as everytime I go there it is packed. I've looked on the website however, it does not state the quality.