"MC Jumbo Card Tricks" from The Wizards' Journal #30 can be used with Jumbo Cards or the really big Giant Cards (8.5" x 11") to perform 4 different effects useful for MC quick bits, or stretched into longer routines.

I use Persistent Joker by Tom Sellers. Can be used with any size cards, but I use jumbos. No slights, no extra cards, no false counts, just a fun and very easy to do trick. Available from trickshop.com

The "Tested Ten-Card Poker Deal" by Aldo Colombini is also well suited for using Jumbo Cards.

The late, great Mark Wilson has a handful of effects with Jumbo Cards in his Mark Wilson Course In Magic one of which uses a Jumbo Playing Card and a regular size deck. It is a very good Mentalism Effect. It takes a little bit of practice, but it is worth learning. Check it out. You will like it.

Hands off by Richard Osterlind is a great effect with Jumbo card

This is awesome

Many self-workers can use jumbos - Shuffle Bored, Gemini Twins, Kranzo's EZ Oil and Water.

I actually recently acquired a jumbo deck and have been looking for effects myself!

Interestingly enough, Mark Wilson's Complete Course in Magic has a whole section dedicated to magic with Jumbo cards.

When of them is the sight gag of having a jumbo card in your jacket pocket as a 'prediction' card. The prediction is show to be incorrect initially, though once the full jumbo card is revealed, it is revealed to be cut in half and the magicians prediction was correct.

I agree, this is a very good effect. I recall it originally being a brainchild of U.F. Grant using a regular size (half) card and an envelope.

Julie

Don Alan's Big Deal has always been a favorite of mine.