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.
The youngest a horse jockey can be to race is 16 years of age. jockey is someone that you pay to ride your horse in a race.   Normally a regular sized human is too heavy, so a jockey stands in  for you.   most are anywhere from â¦ 5'0 to 5'5 tall and weight between 105 to  120 pounds.   A person who rides a horse in a competition.