Even if "navy" is specified, the fabric may differ. Please note that the texture and color may vary. These items are very popular every year. Please consider purchasing early, as they may become scarce during the period of preparation for school entrance and enrollment, potentially causing inconvenience. The fabric is sourced irregularly, so the items currently listed may be the last of their kind. It is a thin but sturdy cotton-polyester blend fabric. There is no lining to allow for quick drying. Size: Approximately 29-31cm (height) x 24-26cm (width) x 3cm (depth) Please allow for a margin of error of approximately ±1cm. Other sizes and colors of the same design are also available. The images are samples. They are made in the same way with fabric cut to the same size. I take pictures to try to get the colors as close to the actual product as possible, but as I am an amateur, there may be slight differences. If you are at all concerned, please refrain from purchasing. I made these with care, but as they are handmade by an amateur, please refrain from purchasing if you are looking for perfection or are overly sensitive.