This pattern is written in English and uses US crochet terms.

Snail rattle is around 5.1 inches (13 cm) when finished.

The pattern uses:

• 1.75 crochet hook
• yarn weight fine
• wooden ring diameter is 2.1 inches (5.4 cm).

This pattern is for the medium level crocheters but if you are ready to try I am always ready to help.
You should know basic crochet stitches including

1. chain stitch,
2. slip stitch,
3. single crochet,
4. decrease,
5. increase,
6. magic ring.