What is a 4 mm crochet hook?
A 4 mm crochet hook is a crochet hook with the metric measurement 4 mm.
It is also known as the US G or 6 crochet hook. In UK terms it's known as the 8 crochet hook.
What letter is a 4 mm crochet hook?
In US terms, the 4 mm crochet hook is also known by the letter G.