This one is easily the most popular: Jay from Lego Ninjago. Worn many many many times.
This is Anakin Skywalker from Star Wars. This was made for book week last year (gosh Oliver looks so young here and it's only last year)
And this one, which was a one off - was for a 4 year old's Monster Scarecrow party. He is only 3 here. The 'straw' is actually wool from spotlight which was really soft but perfect.