How do I make the social icons bigger?

Hi, 

Im trying to make social icons that I am putting on the actual page itself bigger because XL isnt big enough, I saw one post and the coding was:

div#block-yui_3_17_2_1_1592270657102_4612 nav a {
    width: 70px;
    height: 70px;
}

However its not working in my case and I'm not sure if this resolved the issue the other user was having, any help is appreciated. 

I havent yet made my site live and won't do until its finished. Thanks in advance.

Hi,

Can you share link to page where you use icon? We can check easier