how resize all images the same

hello WP, pictures in my site not looking the same all pictures are different in post not the same size. any plugin that show all images the same….
link where pic not samre (http://www.naughtyboss.com/news/french-president-fraincois-hollande-terrible-handshakes/)

[Moderator Note: No bumping. If it’s that urgent, consider hiring someone instead.]