Dee's Big Adventure

Dee of planet Ginormon is working toward achieving her fantasy of becoming a giantess by building a size gun, but the authorities track her down and imprison her for her crimes. She makes an escape as she is being exiled to the Milky Way Galaxy, whereupon she crash lands on Earth and realizes that she already is a giantess on this alien planet!

But the authorities are on her trail, with Dee's own size gun in tow...