Jersey Kings is an insert set in 2004 Donruss Baseball. This 12-card set features game used jersey pieces from current major league stars and retired greats and uses Diamond King artwork from previous Donruss sets. Cards 1-6 are cards of current stars and are numbered to 250 copies. While cards 7-12 are cards of former greats and are numbered to 100. The base level cards are paralleled by a Studio set with 1-6 serial numbered to 50 while 7-12 are limited to only 25. Note that even the Studio series cards typically contain single color swatches rather than patches or prime jersey swatches.