Shohin bonsai are small in dimension and are classified based on their height but there are various definitions but the general consensus is that trees need to be less than 20cm (8 inches) in height to be classified as Shohin. There is a good article on Shohin Bonsai Europe around classification and further examples of the classification on Wikipedia and on BonsaiEejit. Below are some of the Shohin entries in Class 6 of the Open Competition at Wessex in May this year.