So first you need notepad++, search for the Steam workshop folder from Stellaris and the WinRar of this mod.

Open the WinRar and unzip it, start stellaris, make a new mod put the winrar files in that.

Then go to /gfx /models/ combat_items/ search for the .gfx file: _sw_turbolaser_01 open it up with notepadd++ you will then see a codeline with this: scale = 8.5 change that to make them bigger as you like and save it.

You can share that with your friends if you want but i don´t want to see another uploaded mod with these changes, these are easy changes that take 5 min so if you want it, everyone can do it for themself.