Yes, this is knitted pattern for the famous Dr.Seuss Cat’s Hat.
There are two sizes available for smaller heads (approx. 19” (48cm) and bigger heads (approx. 24” (60cm) diameter.
The pattern is knitted in the round, from bottom to top. The brim is knitted last.
You will need less than a ball of yarn each in red and white color.
If you have great idea for how to keep the hat straight please let me know.
I have used a tall piece of paper taped into tube to fit the head of the person wearing the hat and inserted the tube inside the hat. It’s removable and therefore washable and driable.
Have fun knitting.