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carat vs. color  length*  width*
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(or examine a single gem)
* size in mm (optional)

Gem Size Comparison

GemSize is a web app for comparing and learning about gemstone shapes and sizes. It enables you to compare actual gem sizes, which you can view on a ring and finger of arbitrary dimensions, giving you an idea of how the gems would look on your finger.

To start just select the gems, their weight, shape, color and size (optional), and click compare. You can compare two gems side by side or examine a single gem in more detail.

Please note that this site does not sell gemstones or jewelry of any kind. Its purpose is to inform and educate.

Popular comparisons