NuMex Big Jim Chili Peppers. 85 days. Capsicum annuum. Plant produces heavy yields of 12" long by 2 ¾" wide hot peppers. Peppers are mildly hot and turn from green to red when mature. Plant has green stems, green leaves, and white flowers. Developed by the New Mexico State University. A variety from New Mexico, USA. Guinness World Record Holder The NuMex Big Jim was listed in the Guinness Book of World Records as the largest pepper.