These are opal single-color navy blue, using the 25 JAHRE blue color. They are approximately 25 to 25.5 cm. The length from the heel to the opening, laid flat, is about 20 cm. Made of 75% wool and 25% polyamide. If using a top-loading washing machine, you can wash them inside out in a net with warm water up to 40°C. Do not use a dryer. (For drum-type washing machines, hand washing is recommended as they are prone to deterioration and pilling.) These are handmade by an amateur, so please understand. (Please refrain from purchasing if you are sensitive to imperfections or seek perfection.) - After receiving the product, please try them on and let me know how they fit via the transaction message. - No returns or exchanges.