When showing a garment on a person, try to stick to the rule of wearing just one knitted item - the item for your pattern. Wearing more than one piece of knitwear can divert the someone’s attention to the wrong thing. Try to wear simple and neutral-coloured clothing so the item shows up better.
Left: The mismatching and busy clothing is distracting from the hat
Right: When wearing a plain t-shirt, it’s easier to notice the hat and its colours