Little Jack Pumpkins This page first published: Aug 14, 2005 · Updated: May 9, 2018 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Little Jack Pumpkins are small, uniformly-sized pumpkins with a satisfying orange colour to their rind. They weigh 4 to 6 pounds (1.8 to 2.7 kg.) History Notes Little Jack Pumpkins were developed by the Petoseed Company. Released 1992.