My new 25mm crochet hook compared to my other hooks : r/AbsoluteUnits

I found out two of my size I/9 hooks are actually two different sizes.. 5.25 and 5.50. kinda peeved : r/crochet

I thought crochet hooks the same size for all brands, but I guess not. : r/ crochet

Stitch size factor advice? : r/crochet

Made from Ash-tree, these Basix crochet hooks are lightweight and elegant. Our hooks have grooves that prevent stitch slippage even deal with the

Giant Crochet Hook 25 MM, US – U/50 Crochet Hooks for Use with Chunky Yarns (Pack of 2)

Conversion chart for crochet hooks - Craft-Mart

Crochet Hook Sizes and Comparison Chart - Sarah Maker

Loopy Mango

Giant Crochet Hook Size U (25mm)

Will someone please explain why these two hooks are different but the same size? Why is one bigger w/ lowercase “mm” and the other is smaller with uppercase “MM”? : r/crochet

Different hook sizes on the same yarn : r/crochet

Purposefully increasing hook size mid project! : r/crochet