The purpose of this paper is to define criteria used for classifying patients into varying degrees of diabetic control and to verify that children with diabetes maintained in higher degrees of metabolic control do not have delayed growth and maturation. Growth records of 252 children with insulin-dependent diabetes who have been under continuous observation in our clinic at three- to five-month intervals for at least three years and up to 16 years have been individually reviewed and analyzed. All children received two daily injections of a mixture of two parts of an intermediate to one part of regular insulin and were instructed to eat structured meals of high-quality selected foods. An over-all rating for diabetic control based primarily on the frequency and degree of glycosuria was made for the time period between clinic visits. The over-all diabetic control rating and the size of the subgroups were “good” — 20 per cent, “fair to good” — 64 per cent, and “fair”—16 per cent. All children maintained in “good” and “air to good” control (84 per cent), grew and matured at a normal rate regardless of the age at onset or duration of diabetes. All children in lower degrees of control coming under care for greater than 24 months after diagnosis had accelerated growth during the early months after attaining a higher degree of control.