Pattern is easy to follow as it is written with beginners in mind. It is knitted flat in one piece from forehead towards the back. Crown is shaped by working short rows. You get a selection of bunny ears in this pattern, just have to decide which one to knit. Maybe all of them :D Height of the hat, length of the ears are easily adjustable, you can be creative here and make it to your liking. Consumption of material depends on yarn choice but no more than 2skeins are required for all sizes.