After my little son had these shoes and I was thrilled, I've got myself in 47. My wife now also contributes (in 40). Benefits: - Always warm feet no sweat - Non-slip soles - Pleasant wide cuffs and high closing (about ankle) - High wearing comfort - very convenient Disadvantages: - Size figures are not 100% - prefer to order one size bigger (my wife 40 instead of 39, I 47 instead of 46) - Seam at the top may interfere with sensitive people, but does not (we do not care, because the seam is applied not directly on the feet) Conclusion: In the cold season, I do not want another slipper more. Price-performance ratio is absolutely right, the shoe is worth the money! When they are through I order again a new one. Of course about Amazon Prime. Wait one day worth :-)