"Contents: Dental Protector Container and Fitting Instructions Custom Fit in Minutes: The Doctor's NightGuard is similar to the dental protector recommended by many dentists - only you do the fitting yourself in about five minutes. Complete fitting instructions are inside the package and there is a toll-free number to call for extra help. Size Guidelines: Mouth size and body type don't always correspond but as a general rule, choose the size based on the closest description of your height. Medium: Read More