Estamico toddler boys slippers are made with solid rubber sole and warm plush linen. Nice designer upper. The lovely cartoon slippers are very Soft & Anti-slip, inner sole structure specially designed to protect the natural infant foot. As babies feet are different,below size is for your reference ONLY, please choose the size by Sole Length Size--------Inner Sole Length US 5-6 M----5.51 inches/14 cm (Sole Sign: S/5-6 ) US 7-8 M----6.29 inches/16 cm (Sole Sign: M/7-8 ) US 9-10 M---6.69 inches/17 cm (Sole Sign: L/9-10 ) Notes: 1. Please allow 1-3CM differs due to manual measurement 2. Real color may slightly different from pictures due to computer screen's resolution, brightness, contrast etc. Hope understanding. Have a nice shopping day!