This is a polo shirt from the popular American children's clothing brand Janie and Jack. It's size 5 years old (approximately 110cm) and the color is navy. I purchased it at a Janie and Jack store in Hawaii the year before last for about 7000 yen. It's new and has never been tried on (please note that this is a personal inspection and the item has been stored at home). This brand is hard to find in Japan, and this polo shirt has a cute logo on the chest.