Hey,
You can download any icons of the page using the browser inspector.
If you press F12 and go to the network tab it will show all the requests that have been made by the page.
If you then reload the page and hover over an item until its stats are visible, the icon requests should start appearing in the network panel like this:
You can double click one of these items to open the url of the icon, which will look something like https://narrow.one/static/img/menuUI/shop/classIcons/movementSpeed.svg
You can then save the page to download the image. It is an .svg file so you can scale it up to as high of a resolution as you like.