Pattern: Elk Studios Houndstooth Hat

Hook: 5mm

Size: 24M

Yarn: Red Heart With Love

I crochet pretty tightly so, depending on your tension, you may get 24M or closer to Child size if you go down to 5mm (pattern calls for 5.5mm/I hook)

Added a brim…
I also made it in adult size, with plastic canvas to keep the brim stiff.