This is a denim jumper skirt from MUJI. Size 90, with a front pocket. I'm also selling a size 100, as my children are a year apart and wore these. It has two buttons, allowing for some length adjustment. One button was coming loose, so I reattached it with red thread. The denim material has some stretch. I don't think it's thin, so it might not be suitable for the hottest weather, but I think it can be worn in other seasons. There are no smokers or pets in the house. I work full-time and am raising children, so it may take some time to respond or ship. Thank you for your understanding.