Disney Sofia the First Princess Twin Sheet Set Three piece set: (1) Twin Flat Sheet 66in x 96in (1) Twin Fitted sheet 39in x 75in (1) Standard Pillowcase 100% Polyester Microfiber. Machine washable. Kids will love this charming Sofia the First Twin Sheet Set. Any girl who dreams of becoming a real-life princess will love spending naptime or bedtime with Sofia. The vivid designs and bold, bright colors and patterns of this twin sheet set are sure to create delight any fan. In addition, its microfiber construction makes it soft, as well as durable.