Hi. I have created a simple Test unity game and when I ran the game in the unity editor it all looked perfect. But after I built the game to try it as a .exe, everything is zoomed in and extra big. I will have two examples down bellow. With the difference.
As alucardj mentioned, its a matter of aspect / target resolution : the view depends on the format of your window. In your screenshots you can see that the editor view as a ratio of width to height larger than in the exe window. Try resizing windows to understand it better.
In your project settings > player, look at the supported aspect ratios.