Miffy was created in 1955 after Bruna had been telling his one-year-old son, Sierk, stories about a little rabbit they had seen earlier in the dunes, while on holiday at Egmond aan Zee. Miffy became a female after Bruna decided that he wanted to draw a dress and not trousers on his rabbit. Depending on the story, Miffy can range in age from being a baby to being four years old.
At first, Miffy looked like a toy animal with floppy ears but by 1963, she looked the way we see her today a stylized form of a rabbit. Miffy is drawn in a graphic style, with minimalist black graphic lines. Bruna chooses to only use black, white, the primary colors (red, yellow and blue), green and orange. It is his use of primarily primary colors that make Miffy instantly recognizable, and also popular with preschoolers, because of her bright and intense simplistic colors.