There is no required height for sneeze guards unless it pertains to food. The FDA has strict guidelines for sneeze guards used in the food and beverage industry. While there are no height guidelines for general use sneeze guards, sneeze guards should be large enough to protect customers sitting at a table or booth. For standing patrons, the National Sanitation Foundation recommends 60 inches in total height to cover the mouth height of a person up to six-foot-tall.