Customer feedback and official brand fit guides frequently indicate that J. Jill clothing tends to run large, largely due to its signature relaxed, easy-fitting aesthetic and comfortable silhouettes. Because the brand designs its collections to provide a drape that is loose and unrestrictive rather than form-fitting, many shoppers routinely find themselves sizing down, especially when purchasing relaxed-fit tunics, sweaters, and wide-leg trousers. Reviewers often recommend checking individual garment measurement charts or trying on a smaller size to achieve a cleaner look.