Jumbo Cards are over-sized playing cards (usually 5"x7") that are about twice of standard bridge cards.
The began showing up in magic shops for sale, specifically for stage magicians, around 1900 in Spain as the "Baraja Española No.111 Gigante". The started being sold in Germany in 1917 by Conradi-Horster as the "Conradi Riesenkartenspiel".
Jack Miller began using jumbos in 1920 and created one of the first full jumbo-card routine in 1923 being billed as "The Original Giant Card King".
- "If a Jumbo card is inserted in a bridge deck, it makes a wonderful locator." — Al Baker in The Sphinx )Vol.31 (1932), page 273)
- ↑ THE ENCYCLOPEDIC DICTIONARY OF MAGIC 1584-2007 by Bart Whaley (2007)