Thank you for viewing! This is a protective cover to be used on the chin rest of a violin or viola. It protects your precious instrument from dirt and sweat, and is made at the request of those who have allergies to metal or varnish, or those with sensitive skin. This cover can be used on both violins (4/4) and violas if they have a Guarneri or Kauffman type chin rest. (Currently not compatible with Fresca type or other shaped chin rests) Outer dimensions are approximately 20cm x 12cm, the pocket opening is about 10cm, and the depth is about 4cm. The front side is made of soft-touch sheeting fabric (100% cotton), the inside is twill fabric (100% cotton), and there is no batting inside, making it extremely thin and stress-free to wear. Both the front and back are made of the same brown cotton fabric, but the color tones are slightly different. ⚠️Photos were taken with a smartphone, so the colors cannot be captured as they are. Please note that the colors in the photos may differ slightly from the actual product. Cover the chin rest with the pocket part and secure it with the rubber band on the back. Very soft mask rubber is used so it will not damage your precious instrument. It should not affect the sound, but if you are concerned, you can put it on top of the shoulder rest or wrap it around the shoulder rest. Also, if you put it through the shoulder rest, you can save the trouble of attaching and detaching it every time. The length of the rubber band can also be finely adjusted with the stopper. This stopper is also made of silicone, so it will not affect the instrument or the sound. The button is made of acrylic, but the back button that touches the instrument is made of soft felt fabric. If it gets dirty, please wash it gently by hand. Ironing is possible except for the rubber and buttons. Images 9 and 10 are the instruction manual. (A sample was used for the photo) ⚠️It will not be included, so please save it by screenshotting it if necessary. As a stringed instrument player, I make each one carefully with care and attention, but since they are handmade, please refrain from purchasing if you are sensitive to details. Thank you very much!