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.
Many professional racing associations state that jockeys must weigh no more than 126 pounds with all their equipment, which means that they usually weigh around 110 pounds without their gear. The shorter a jockey is, the easier it is to meet this weight limit; however, there are no official limits placed on height.