This is a size M for children. The color is navy. There's a single line on the sleeves ♡ It's made of a smooth, cool fabric (((o(*ﾟ▽ﾟ*)o))) It's perfect for this hot weatherー✩.*˚ Please be aware that there is a name written on the inside tag. Please consider this only if you understand that it has been stored at home (*^^*)