Based off of the hat Hermione Granger wears in Harry Potter and the Deathly Hallows Part 1. She sports it during the Godric’s Hollow scene.

One size only.

The aqua hat and teal hat are the actual blocked and finished hat, the purple is a shortened version.

For the shortened version, knit to 4-1/2 to 4-3/4 inches from cast on edge.