Make your own Star Trek: Voyager Threshold mutant lizard!

Any worsted or bulky weight yarn will work, just use the appropriate hook for the yarn. The size of lizard will depend on thickness of yarn used and the tightness of your stitches.

Gauge only matters in the sense that it and your yarn choice will affect the size of the lizard.

The smaller lizard in the picture was made with Patons North America Canadiana Solids while the two larger ones were made with an unknown bulky yarn from my stash.