I read a sci-fi story back in the 1950's that I believe was called "The Size of Things".
It was about the invention of a serum that would put humans into suspended animation for hundreds of years and the invention of a light speed space ship. The party left earth, and slept for eons aging only hours when they woke up to look around. When they were all old and grey, the ship approached a huge barrier. They stopped, made a hole in the barrier, and looked around.

Can anyone tell me the author's name and the title of the story?? Thank you