This is a set of two pairs. The size is 23-25 cm. * The box will be opened for shipping. The box will also be included. It has a spiral compression design that allows for smooth removal and wearing without constricting the lymph nodes and veins. Approximately 90% of pregnant women in their 32nd to 36th week of pregnancy found them easy to wear. (2019 Hakuzo Medical survey results) The comfortable compression level is not too strong, making them easy to wear for long periods. Ergonomically designed with a golden ratio compression specification. (Sole: Ankle: Calf = 2.2:1.6:1) The non-slip sole allows pregnant women to use them safely. Hakuzo Hakuzo Medical Mama Lac Fit Socks