These are adorable little earrings that can be perfect for dressing up or dressing down. The diamonds are pretty white and eye clean from a distance. There is one carbon spot on one of the stones that I didn't even notice until I started taking macro pictures of the earrings. The backs are screwback and are very secure. I just had the earrings checked and double checked by a jeweler so the diamonds are nice and secure in their setting. The top diamond is 2.5 mm and the bottom is 3.5mm.