National Producer Number definition, categories, type and other relevant information provided by All Acronyms. NPN stands for National Producer Number Search for acronyms, abbreviations,
Height Considerations. There are no height limits for jockeys. However, jockeys tend to be shorter than normal to meet the weight guidelines. The average height for a jockey is between 4 feet 10 inches and 5 feet 6 inches.eight Limits. Depending on specific race and track guidelines, a jockey must weigh between 108 and 118 pounds without clothing and equipment, which can add a significant number of pounds.
Minimum 32 inches (81cm) to ride. Must be at least 54 inches (137 cm) to drive. Persons who do not meet the minimum height requirement must ride with a responsible person who meets the requirement.eight minimum is 40 inches (102 cm). Special effects may be too intense. For safety, you should be in good health and free from high blood pressure, heart, back, or neck problems, motion sickness, or other conditions that could be aggravated by this adventure.