Height Requirement for NDA One most Common Question is What is The Height Requirement For NDA The joining age of NDA is 16.5 – 19.5 year. 12th appearing or 12th passed candidate can apply for the NDA . NDA exam is  being under adolescence age.According to Human biology under this teenage the height increases. Where the height of boys increases till the age of 21 and the height of girls increases upto the age of 19. That means some of the individual joining NDA are still growing. In NDA the aspirants joins  tri services-Army, Air Force and Navy. For Army  Male