there used to be a trick to doing this, and in a previous OS, they WERE smaller as well. but presently, it is what it is. you CAN combine apps into folder in Launchpad, if you want to get organized and simplify things (i have, for instance, all my least or never-accessed apps in a folder on the last page...)
Thanks for the quick response, I'll put some apps in a folder. Just thought you should be able to resize the icons as they are too big.
This still works in El CapitanIs it it possible to make the application icons smaller?
The size of the icons in launchpad is determined by the size of your screen, and the icons are automatically adjusted in an 8×5 grid. I found a workaround that allows you to change the grid – this has the side effect of reducing (or enlarging) the size of the individual icons, and allows the user to have more icons on the screen at the same time.
By default there are 7×5 icons (35 icons in total). You can change this to anything you want with a couple of simple commands in the terminal.
Change the number of icons in launchpad
To show 100 icons (10×10), open terminal and type
defaults write com.apple.dock springboard-rows -int 10 defaults write com.apple.dock springboard-columns -int 10 killall Dock
This will help you get small icons by reducing the icon size in launchpad!