My feet are a size 13 US. They're fairly ticklish but not as much as I would like them to be. If I'm in the mood for being tickled, they'll get more ticklish. They're most ticklish along the sides of my heels, followed by my soles. My toes are not ticklish at all, which surprises most people. If someone tries to tickle my toes, all I will feel is pressure!