Megan on X: I like to use Size 4 yarn the most for my amigurumi! Also while the recommendation on most size 4 yarn is a 5.5-6.5mm hook I like to use

What Size Crochet Hook or Knitting Needle for what Ply Yarn

Yarn Weight Chart for Crocheting: Ultimate Comprehensive Detailed

What amigurumi hook size should I use?

Crochet Yarn Weight Chart - Easy Crochet Patterns

Best Crochet Hook for Amigurumi and 12 ways for Choice Selection

Best Crochet Hook for Amigurumi and 12 ways for Choice Selection

Guide to Hook Sizes for Amigurumi Crocheters - Sweet Softies

Yarn and hook combination for Crocheting Amigurumi – Sugaridoo

Best Yarn for Making Amigurumi - Cuddly Stitches Craft

Yarn for Amigurumi – PlanetJune by June Gilbank: Blog

How to Read a Yarn Label - YarnThrift