Materials:
Yarnart Jeans (✓2, yarn density 50g/160m/174yds), color:
brown
1 mm crochet hook
Glue
Plastic eye, diameter 5 mm
Metal hair clip (hairpin), 4,5 cm (1,8 in)

Product Sizing:
Finished size: 6 cm (2,4 in)

You can use any other yarn, but keep in mind that this will affect the size of the finished product.