"Ant-Man" is a superhero that can change his size. Usually he can get very small, but sometimes he can get large as well. In the movie 'Ant-Man' (minor spoiler here) there is a scene where he is handcuffed. He manages to get small and thus slip out of his cuffs.
My question is: Is there a way to secure Ant-Man such that he can't escape even if he changes size? Using only chains, ropes, and locks, how can Ant-Man be restrained? There may be more than one answer to this.