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

Octopus is about 3.5 inches (9 cm) tall and about 6.7 inches (17cm) wide, but this will vary depending on the size of your yarn and crochet hook.

The pattern uses:

• 1.75 crochet hook
• yarn weight fine

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

• chain stitch,
• slip stitch,
• single crochet,
• decrease,
• increase,
• magic ring.