This is a suit for children. It is labeled as size 10. I've included a photo (photo 8) comparing it to a Uniqlo size 100 pair of pants. They are almost the same size, so I think it's around 100 (the Uniqlo pants are not included). Originally, there are some areas with loose stitching, fraying, and the long-sleeved T-shirt has stains. It should be fine for short-term wear. How about for attending a wedding?