No matter you foot size I would recommend bringing an extra pair of shoes. In your work place, you generally won't be allowed to wear sneakers or tank-tops. Keep this in mind when packing your bags. Personal Products Koreans generally don't use deodorant, so it is very hard to find. Females that use tampons and are particular about a certain brand, may wish to bring a year's supply.
Tampons are available at pharmacies, but the brands are limited and the quality is often low.
Shaving products are available, but in only a limited variety. Your electric shaver should work in Korea. Spices If you are gourmet, and plan to make western delights while in Korea you need to bring along some of the spices you are accustomed to. Allspice, caraway seed, basil, garlic salt, nutmeg, celery seed, cloves, cumin, onion salt and oregano are difficult to find in Korea. Vitamins and Medicine I personally recommend you bring a supply of Vitamin C. You will be entering a foreign country with foreign germs and virus.