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.
To make weight in anything but high-class stakes races, jockeys had to keep their weight to no more than 114 lbs. Riders competing in ordinary weekday events needed to whittle themselves down another 5 lbs or so, while those in the lowest echelons of the sport couldnât weight much more than 100.