I can understand how “then” and “than” can be confusing, because they sound so much alike. However, “then” usually refers to a time frame. For instance, you say, “I ate at the restaurant; then I went home.” Or “First the sun shone, but then it rained.” In each instance, we have a sequence in time where the second event is introduced by the word “then.” “Than,” on the other hand, is usually used in comparing two things. Examples: I am taller than my brother. Your cookie is larger than mine. It was more than I wanted, but less than I expected. So to recap, “then” is about two things with one happening before the other. “Than” is also about two things, but we are comparing them at the same time.