Adding custom fonts from icomoon

Hi guys,
I would really appreciate any help with my problem. I apologize if I’m asking something basic but I couldn’t find any solution to my problem elsewhere. Thanks in advance for any help.
So here is the problem:
I’ve created a custom font using Icomoon. And now I’m having some problems while adding it to my wordpress theme. I have uploaded the font files (eot, svg, ttf, woff) to the fonts folder of my wordpress theme by replacing the original fonts files. As far as I understand I need to edit the css of my wordpress theme for my new font to be able to work properly. Can anyone please explain what and where should I add in my css to be able to use the new font? Thanks again for any tips and advice!