During the winter, I keep the CH's and my Birkenstock sandals in (never used for trash) trash pail by the entrance. I do this so our shoe box area (the genkan) isn't full of shoes and the students who come to my apartment have room to park their footwear. Occasionally in winter time, I'll fish out my sandals and put them on for a quick run outside because putting on other shoes takes more time. Last time I did this, I tossed them haphazardly back into the pail such that one of them was laying on top face up.
Last Saturday as one of my students was leaving, she was zipping up her boots and noticed my displayed sandal. She said, "oooo, big!" I told her that that was my sandal and she said, "very big!" My feet are size 8.5 in U.S. sizes, and about a half size too big for the biggest size of shoe for women in Japan. I either have to get shoes from back home, or buy men's shoes (this only works for tennis shoes). My feet are also quite wide because I haven't tended to wear shoes much my entire life and that has resulted in rather splayed bones.
I wasn't offended in the least by what my student said, but I did wonder if that was the sort of thing that generally would be considered offensive back home. I guess a lot depends on how self-conscious someone is about their foot size. This did remind me of the fact that Japanese people are generally more liberal about commenting on body sizes and imperfections than Western people are and that it isn't considered offensive in their culture. They say the same sorts of things to each other, perhaps more often than they say it to us. It's one of those cultural differences that can be a bit hard to adjust to at first because Western culture generally frowns on talking about anything related to bodies which is outside the norm, particularly in terms of something being too big.
In the end, I take what the student said as an indication of her increased comfort level with me as a person after being my student for over a year now. Perhaps I can mention her teeny tiny feet at some point in the future to return the favor.