"Not much to look at" is an expression that is often used to describe something that is unimpressive or visually unappealing. The antonyms for this phrase would be "striking," "stunning," "magnificent," "gorgeous," "exquisite," "spectacular," "impressive," "breathtaking," "mesmerizing" and "eye-catching." These antonyms refer to something that catches the eye and elicits a positive and emotional reaction of awe or admiration. In other words, they are used to describe something that is visually stimulating and leaves a lasting impression on the viewer. Whether it's a person or a piece of art, these antonyms emphasize the beauty and grandeur of something that is truly remarkable.