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 minimum weight was last raised in 2002, from 7 stone 10 lb to 7 stone 12 lb. Dr Michael Turner, Chief Medical Advisor to the British Horseracing Authority, said: âThe initiatives being implemented in 2013 represent a significant forward step for the welfare of British jockeys.