This is an eco-bag made from fabric from the Shikihide stable. It has a thin lining. Different fabric is also used on both sides of the outer fabric. It's light and easy to fold. You can make it compact with the rubber band at the opening. How about it as an eco-bag? A4 size fits. Size: Width: Approximately 45 cm (opening), Approximately 30 cm (bottom) Height: Approximately 38 cm (when flat) Gusset: Approximately 14 cm Handle: Approximately 45 cm Rubber band: Approximately 14 cm Please understand that this is handmade. We make them carefully, but there may be some imperfections.