Found the smallest hook I've ever seen, in the things my Gramma gave me years ago - 0.6mm! : r/crochet
tutorial]: Beading with a Crochet Hook (knitting) - knotions
Crochet Hooks Set Steel, 12pcs Small Size Crochet Hook Needle 0.6mm To 1.9mm Sweater Scarf Clothes Knitting Crochet Tool, Single Pointed Knitting Need | Fruugo NO
Sizing Up Crochet Hooks | Knit HeartStrings Learn-and-Knit-Alongs
5PCS Latch Hook Different Sizes Small Crochet Hooks Needle for Hair | eBay
Amazon.com: Katech 6 pcs Small Sizes Crochet Hooks (0.5-1.75 mm) Hair Crochet Needles Ergonomic Soft Grip Handle Lace Crochet Hook Set Smooth Knitting Needles DIY Yarn Weave Tools for Fine Work, Lace
Amazon.com: 12 Crochet Hooks Set Steel, Small Size Latch Hook Crochet Needle 0.6 mm to 1.9 mm Sweater Scarf Clothing Knitting Crochet Tool Ergonomic Handle Crochet for Lacework Weaving Needle