Of all the four Cs of diamonds, carat is typically everyone's favorite to talk about. As soon as someone gets engaged and flashes their new sparkling diamond, the first thing one notices is size. We can't help it—it's just natural to notice size first. And although some may say asking "how big is it?" is the equivalent of asking a woman how old she is, it happens quite frequently.

Read The Knot's different diamond carats sizes post here