This is a long-sleeved, off-white shirt from Tartine et Chocolat with a cute frilly collar. Made of soft, stretchy fabric with elastic cuffs, it's comfortable for children who aren't used to formal wear. It was used for a graduation ceremony and an entrance ceremony. It can also be worn for weddings, Shichi-Go-San (a traditional Japanese festival for children), recitals, and other occasions, so I think it can be worn many times. A dress from the same brand is also listed on a separate page, and a photo of them together is shown in the 7th image. Material: Cotton - 95% Polyurethane - 5%