Blue Swim Ring MADE IN JAPAN (Photo 9) Size: Inner diameter: 35cm Outer diameter: 68cm Purchase date and frequency of use unknown. There are a few small stains if you look closely. It has a rough texture with a fine mesh pattern like fabric. Air slowly leaks out when the valve is open (the valve is a little loose), but air does not leak when the valve is closed. Even when fully inflated, it held air for 5 days without any leakage. The string was deteriorated, so it was removed. It will be deflated and folded for shipping.