You will also need:
One Crochet Hook Size 3.00mm
One Crochet Hook Size 4.00mm
One Crochet Hook Size 5.00mm
3[3:4:4:4] Buttons For Jacket.
1 Button For Helmet.
Tension:
19 sts and 10 rows to 10cm (4in) over pattern using 4mm crochet hook.
16 sts and 8.5 rows to 10cm (4in) using 5mm crochet hook.