Precision Cutting Board
If you are a budding chef or a baker who takes your ingredients seriously, you should get this precision cutting board developed by The Obsessive Chef.
This cutting board that is made out of bamboo has guidelines on it that allow you to chop your ingredients in a more precise manner. For example, if you want an ingredient to be medium diced, there is a guideline for it that allows you to medium dice the ingredient consistently.
There are also other guidelines such as small dice, brunoise, fine brunoise, bâtonnet, allumette, julienne, and fine julienne.