I tend to gravitate towards a G hook, even if a larger hook is specified. Plus, many of my hats are crocheted to diameter or length rather than gauge or tension.

PDF Pattern Only Burgundy Crochet Hat with rib outline petals from the crown and raised bubbles around the band. Brim runs all the way around the hat and can be worn flipped up.

Hat will fit med to large woman sizes. You can also make a tie to adjust size.