When describing someone who is dressed nicely or looks put together, the phrase "be/look a picture" can be used. However, if you're looking to switch things up, there are a number of alternative phrases you can try. "Sharp as a tack" is a great option for someone who looks polished and well-dressed. "Dapper" can be used to describe someone who looks stylish and well-groomed, while "chic" is ideal for someone who looks elegant and fashionable. "Impeccable" is another fantastic choice, as it conveys a sense of perfection and flawlessness, particularly with regards to one's appearance. With so many great options to choose from, you're sure to find a phrase that perfectly captures the essence of someone's appearance.