How to make an png as small as an icon

Hello everyone, 

I need help to make the png below as small as social media icons. Please help! 🙏

you can find it at the bottom part of the website.

https://ptphotography.squarespace.com/shop

Add to Home > Design > Custom CSS

div#block-yui_3_17_2_1_1603716394587_20109 {
    width: 50px;
    position: relative;
    top: 30px;
}