These room shoes are for those who wear approximately sizes 23.0-23.5. The gray yarn is 100% wool, and the green yarn is a blend of acrylic and wool. For care, please hand wash or use a laundry net. I knitted them carefully, but as I am an amateur, please understand that there may be some unevenness in the stitches. *Sizes are approximate, so please refrain from purchasing if you are looking for perfection.