Size tips:Size 36, 37, about 23-24 cm longSize 38, 39, about 24-25 cm longSize 40, 41, about 25-27 cm long.FLEXIBILITY & COMFORT: The unique construction and design of these slippers provide a perfect fit every time and are easy to put on in just a second.NON-SLIP AND DURABLE SOLE: The textured bottom of the indoor and outdoor sole hugs the floor to help prevent you from slipping.Ideal for wearing indoors in home bedrooms, kitchens, restaurants, offices, study rooms, etc.A great Christmas, birthday, New Year, anniversary gift for female friends, mothers, girlfriends, colleagues, etc.SUPER SOFT COMFORT: The perfect pair for everyday wear, these cotton slippers offer a comfortable and effortless look, their lightweight construction and fully lined knit material provide your feet with extra comfort, breathability and relaxation