The dimensions (length x width x depth) of a 10 carat Round Brilliant diamond are generally 14 x 14 x 8.44 mm. Considering that the average width of a woman’s ring finger is between 16-17 mm, and for men between 19-20 mm, a 10 carat diamond in this shape would appear quite large on hand, although a virtual try-on would give you a better idea of exactly how it would look on your finger. For fancy shapes, like Emerald, Oval, or Pear cut diamonds, 10 carats might appear even larger on hand due to their elongated form.