Knowing the right diamond engagement ring to buy is hard for most men, but there are some clues to getting her the perfect ring just by looking at the bride-to-be's hands.

Generally, diamonds that have cuts with more surface area are better for women with larger hands. Princess cut, Emerald cut and even Round Brilliant cut diamonds work well for large fingers. Avoid Pear-shaped diamonds and any other diamond cut that is long and thin.

If your diamond is not very large, you could also get a thicker band for it, which will also help make the ring more flattering on a larger finger.