Pick the initial of your choice and we ll craft it in a lightweight lab diamond tube design that s perfect for everyday wear and stylish stacking. The length of the chain can be adjusted to either 16 or 18 inches to suit individual preference. As each personalized necklace is a one-of-a-kind creation all sales are final and cannot be returned or exchanged. Each unique diamond-adorned letter will vary in carat weight from 0.32 to 0.91.