Dalmatian costumes worn once by a parent and child for Halloween. The child's costume is sized 12-18M, but the fit is like an 80-90 size, and it fit perfectly on a 2-year-old girl of average height and weight. It's a romper design that fastens with Velcro, and the tail is removable. The adult costume is a set of two thin T-shirts. The sizes are XL and XS, and you can layer them over thermal underwear like Heattech, so they were fine for a Halloween in cold weather. Please feel free to comment if you have any questions.