going to my high school

Well, yesterday my friends from high school and I were chatting about going to our high school. Though I like it here, I miss my friends from high school, and suggested to meet together someday. We thought of going to there with our school uniform, and surprise teachers. I wonder what the reactions of teachers are to see in our school uniform. I think I haven't changed much since I graduated from my high school, so teachers will notice me, or they might take me as a high school student. My friends say that they look quite different from what they were and I am also looking forward to seeing their changes. One thing that I'm worried about is that I could still be able to fit my uniform...