"He couldn't be happier to be involved and make this one-of-a-kind ring," Cohen explained. According to E! News, the ring features a four-carat, round-cut diamond. It's also engraved with the word "Lioness," which is Ashgari's nickname for Britney. "Every designer I spoke with about the ring was amazing with great ideas, but I just clicked with Roman—we really connected on the design and he was as excited as I was to make it special—that's why I chose him," Sam said in a statement. In a new Instagram video, Britney confirmed to her fiancé that she's over the moon about her new sparkler: