"The Professor's Nightmare" is one of the most popular rope tricks of all time, and with good reason.
Here is an offbeat version that uses pictures of ropes printed on the cards. It packs very small, but plays very big.

(Effect)
The magician displays three cards with drawings that, when placed together, form a picture of three ropes of different lengths.
The cards are gathered. A magical gesture is made and the cards are re-dealt.

Now, the three ropes are of equal length!

But that's not all; the process is repeated, and this time when the cards are dealt out the pictorial ropes have joined together into a single line.

Three Rope Card Trick Jumbo (watch video)

*Comes with instructional video link, go to your downloads section for this. It will be available once your order ships.*