List of United States standard crochet hook and knitting needle sizes

The standard sizes for crochet hooks and knitting needles in the United States can vary slightly depending on the source, but here's a general list of their sizes: ### Crochet Hooks: Crochet hooks in the U.S. are typically sized using letters or numbers. Here’s a common sizing reference: - **B/1** – 2.25 mm - **C/2** – 2.75 mm - **D/3** – 3.