Product Specifications: 38-39,40-41,42-43 Color: white, brown Material: EVA Package content: 1 pair of massage sandals and slippers 1.RELIEF: Designed to soothe foot/ heel pain & tension due to arthritis, neuropathy and other ailments. Great healthcare relaxation gifts for your family, friends. 2.RELAX: 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!