Carat weight
This is the size of the stone, this can be measured in points, 100 pointe = 1 carat. For example 0.10ct = 10pt, 0.25ct = 25pt or ¼ carat, 0.50ct = 50pt or ½ carat. Diamonds come in all different sizes, hand picking a diamond to suit can be lots of fun along with a great learning experience.
Please note that above image, is not to scale.