When 3D printing spoons, the diameter and depth of the spoon bowl are important factors to consider. The ideal diameter and depth will vary depending on the intended use of the spoon. For example, a spoon for eating soup will need a larger bowl than a spoon for eating dessert. The depth of the bowl will also affect how much liquid the spoon can hold. A deeper bowl will be able to hold more liquid than a shallow bowl.
In general, a good starting point for the diameter of a spoon bowl is 1 3/4 inches. The depth of the bowl can be adjusted as needed. If you are unsure about the ideal diameter or depth for your spoon, it is always best to experiment until you find what works best for you.