Comfort matters here more than most events — you'll be walking, standing and likely on your feet for hours. A block heel or low heel is the most practical choice: still dressy, but manageable for a full day. If you want to wear heels, wedges are easier to walk in than stilettos on grass or uneven outdoor venues. Strappy flat sandals work well for a more relaxed graduation or a warm-weather outdoor ceremony. Whatever you choose, make sure you've worn them in before the day.