These are amazing! Only used maybe 5 times then were no longer needed, but they work great. XL size is for C cup or larger. Very helpful for breastfeeding. Bought a month ago. Silverette are small cups crafted out of pure 925 silver that fits over and helps to protect nipples while breastfeeding. Breast Feeding Essentials: Silverette cups are easy and comfortable to use-no other cream or lotions are needed. In addition, SILVERETTE is the lightest healing cup available: one cup weighs only 0.1 oz. SILVERETTE’s anatomical shape has been tested to fit any size nipple without compressing it. The rounded apex and shape let air circulate, and the edges are folded by hand to avoid pain. The Original Nipple Protector Sheild for Nursing Newborns: SILVERETTE are the ORIGINAL silver nursing cups and breast shields that fully licensed silversmiths have crafted in Italy to provide sore nipples relief.