This is a formal set from Comme Ca ISM. It was worn once for a celebratory occasion. All sizes are 100. Recommended for outings, graduation ceremonies, entrance ceremonies, interviews, dinner parties, weddings and funerals, recitals, etc. The polo shirt is made of cut-and-sew material, so I think it will be easy for children to move around in. Please refrain from purchasing if you are sensitive to used items.