If you live in a cold climate, I recommend using the fleece lining for the added warmth. Sewing the lining into the hat also adds some structure so that the stitches don’t stretch out. I designed the hat to be extra slouchy but slightly larger than necessary to accommodate the thickness of the lining and for Donatello’s adult man’s head. If don’t plan on using the lining, you must decrease the number of stitches when casting on because the hat will be too big. To reduce the size of the hat for a smaller head, decrease the cast on stitches by multiples of two. For someone with a slightly smaller head, perhaps an adult woman, I’d cast on at least 10 less stitches.

Finished width: 28 cm/ 11″
Finished height: 26 cm / 10″

One set size 3.25mm/ US #3 circular needles (16″/ 40cm)