Captain America Comics #26

Cap and Bucky avoid the acid by changing size and then board a size change ship which takes them to Mita, the microworld. Unknown to Bucky, a shrunken Togaro has hitched a ride on his cuff. He plots to use his own size change ship to destroy Mita and take his men back to Earth for conquest. He causes his size change ship to grow so big that it throws Mita out of its orbit into the sun. The population panics, but Cap uses their size change ship to grow big enough to house them and they pursue Togaro back to Earth. Cap and Bucky take enough of the enlarging drug to defeat Togaro and his giants.