Tell me this: Is there such a thing as decent quality jumbo cards? I'm not looking for Bicycle quality but all of the ones I have found are utterly terrible...
There are Bicycle Jumbo Cards in the "Big Box" : http://www.penguinmagic.com/p/S5598
There used to be a different "Big Bicycle" version that were thicker, but Bicycle switched to the new design. There are not any of those cards readily available.
You also can get Parlor Sized cards from Card Shark: http://card-shark.de/index.cfm?page=57 Those aren't quite as big as Jumbo but are visible and easier to handle.