Usage patterns
〈物〉の外側the outside/outer side of X
I put a label on the outside of the box.
外側から〈動詞〉to do something from the outside
This door can't be locked from the outside.
外側に〈動詞〉to face/move outward
外側を〈動詞〉to go around/along the outside
I went once around the outside of the park.