This is a set of two Moomin socks, a souvenir from Helsinki. When laid flat, the length from toe to heel is about 11cm. EU size is 25-27. This is approximately 15cm-16cm in Japanese size. Please refer to the size chart in image 6 for comparison. Before purchasing, please check if the size is similar to the flat size of your existing socks. The design is not sold in Japanese online shops. My daughter, who usually wears 15-20cm socks (shoe size 18cm), found them clearly too small, so I am selling them unused.