Like all adult (or near-adult) dragons, Daria's real shape is way too large to fit inside most human buildings comfortably, and that includes ones in our world. However, a large lecture hall that was built to hold several hundred students (such as the one being used for Eric and Daria's class) would be plenty big enough for a young-ish dragon like Daria. By the way, the last panel of this strip references both Strip #926 and Strip #1,025, in case you've forgotten about that little mishap. ;)
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