According to Cribb, henryi grows 12-22" tall. Personally I don't consider it a large species. The flowers are small, and the plants are slender. The plant is similar in stature to Cyp calceolus. This is what I would call a medium sized species. For me the larger species are ones like fasciolatum, kentuckiense, reginae, etc. that have big flowers and big leaves. C. fasciolatum, for example, is fairly short, but the large flowers and leaves make it seem bigger. C. henryi has some height, but it's not a very "substantial" plant.