Vivo en México y calzo del número 7, es decir, mi pie mide 27 cms. Before I jump into my pros vs cons lets just mention my personal final thoughts. Sticking these labels on the lids means I can just grab the one I want. I have plantar fasciitis and on my feet all day, by the end of the day my feet are swollen and the soles are so sore; I am unable to wear heals for very long anymore and flat sandals make my feet hurt worse. I love that all I had to do is turn it on, no messing around with different frequencies or any other buttons or hassle to make it work. Big fluffy slippers are nice idea but often end up sweaty and stinky. Got these for a very active 2 year old and she wears them all the time! I’m very disappointed seeing as I thought I would receive the EXACT same waist trainer as the first time, but for some reason they gave me a completely different waist trainer?I specifically choose this brand because I’ve seen good reviews and wanted the exact same one as my medium. Thanks for reading! I got these to help me organize my garage.