Mason Jar Cozy. The perfect accessory for your mason jar. Handmade crochet using 100% acrylic yarn. Sized to fit an average to large sized mason jar. The one pictures is a 16oz. If you would like custom orders or a custom color or color combination or quantity just email me. Material used: 100% acrylic yarn Color: available in several colors Size: will fit standard size jar Care: For best results hand wash; lay flat to dry.