My child used this for about a year, but it's become too small, so I'm selling it. The size is listed as M. Measurements (laid flat): Width: Approximately 28cm (x2 = 56cm) Length: Approximately 54cm Material: Cotton: 88% Nylon: 8% Polyurethane: 4% Since it's mainly cotton, it can be used year-round. It's an adult M size, but some children don't like things that are too tight when they sleep, so it's also suitable for children who have outgrown kids' sizes. Of course, it's also suitable for adults who wear M size. It was folded in half when used, so there's a faint line in the middle. It will be simply packaged and shipped via Mercari delivery, anonymous shipping. #bellyband #belly warmer #child #cotton #beige #kanoko