Polycotton with unicorn design and the words "BRB Just Baking Some Rainbows".  (BRB is short for "be right back")
 
Material is 35% cotton and 65% polyester.  Height 80cm Width 70cm.  Suitable for adult or older child with some adjustment (you would need to shorten the head loop or tie a knot in it to make it smaller and possibly double over the length of the apron depending on the height of the child).

Poly cotton unicorn apron

AU$20.00Price