Product Description Specifications: 38-39 Color: white Material: EVA Package content: 1 pair of massage sandals and slippers Designed to soothe foot/ heel pain tension due to arthritis, neuropathy and other ailments. Great healthcare relaxation gifts for your family, friends. Refreshes tired, sore, plantar fasciitis feet. Promotes better blood flow to enhance overall health. 3.Gentle reminder: these are specific foot acupoint stimulation slippers, that are quite painful when you didn't get used to it. If you are looking for all-day wearing house slippers, don't take this one. 4.SIZE: Considerable strap design to adjust the slippers width. If you are between sizes, take larger one. 5.Applicable and portable foot massager: perfect for feet of all sizes.The foot massager roller is large enough for both feet, but also compact enough to easily store or carry in a small bag. Our massager is portable enough to be used when travelling, working or watching TV. Take it with you wherever you go