For the Marines, height standards for male applicants range from 58 to 78 inches. Height standards for female applicants range from 58 to 72 inches. The services have both height and weights standards. If you fail the height / weight charts, but pass the body fat standards you are still eligible for service.
Most dogs require 1-2 years to become a service dog and be fully trained in public access skills. The training cost of working with a professional trainer at $150 an hour would be about $7,200 a year.
The most highly trained service dogs are specially breed, socialized and trained from birth to 18 months when they begin their specialized service training. To properly train the dog to identify the scent and then work with a diabetic handler to properly alert, takes another 6 months to one year.