Bonsai Tree Size Classification
Bonsai tree size classification is as much an art form as designing the shape and style of a tree. However, these categories although having relative importance, are not considered mandatory as many are not concerned about the exact size.
Arguably the only classification that remains unchanged through time, is the Imperial bonsai, due to its origin and name. Meaning, that the largest bonsai trees found in the Japanese imperial gardens are Imperial bonsai.