Crochet hook sizes are determined by the diameter of the hook. The size is mentioned in metric units along with an alphabet. Hook sizes are related to the size of stitches.
Crochet Hook Sizes - Best Hooks, Types & Charts
Crochet Hooks: Types, Sizes, and How to Choose the Best One
Best Tunisian Crochet Hooks To Get You Started - CrochetKim™
TUNISIAN CROCHET HOOKS - A BEGINNER'S GUIDE [How to Choose and Use
How Do You Match A Crochet Hook To Your Yarn? – Darn Good Yarn
Guide to Sizes and Types of Crochet Hooks
Crochet Hook Size Chart + How to Pick the Right Size for Your Project
The Ultimate Guide to Crochet Hooks: Sizes, Shapes, and Types
How Crochet Hook Sizes influence your Project Gauge
Choose the Best Crochet Hook for your Crocheting Style
Crochet Hook Sizes: Choosing the Right Hook Size
How to Choose the Best Crochet Hook Sizes - The Spinners Husband
The Ultimate Beginners Guide to Crochet Hooks - Pretty Darn Adorable
Crochet Hook Sizes: Choosing the Right Hook Size
What are Crochet Hooks Made Of?