Constructing quality gimmicks demands quality tools. The Murphy's Elastic Utility Thread is a tough, durable, clear elastic thread that can handle almost any application. Each spool has transparent, elastic thread. The thread has a high-tension strength, with a low-gloss finish that will keep your thread hidden when in use. No stripping required so you can start using it out of the box. If you are repairing a card gimmick or inventing a new trick EUT is a must have for your tool box.

3 Meters = Ideal for making 6-8 card gimmicks 

20 Meters = ideal for making approx 30-40 card gimmicks

200 Meters = ideal only if your are making many gimmicks , useally for selling futher.

If you are a normal magician you should buy 6 or 20 Meters.

If you are new to magic start with 3 Meters.