This pattern is for a sheep with a yarn of 115m/50g (crochet needle size 2.5) the little sheep will be approx. 6 cm high and 6 cm long.
The bigger the yarn, the bigger your sheep will be.

You need to know:

chain stitch (ch)
single crocht (sc)
increase
decrease
magic ring
bean stitch

If you have questions, just let me know. Have fun :)