You can select your preferred icon size from the right side dropdown menu, as shown below.
Currently, you can filter sizes between 16 and 512 pixels. You can preview how the icons will look like, as they automatically resize when you choose a different size.
If you click on an icon, a window with options for downloading will show. If you want to download a PNG format you can choose the size like in the screenshot below. Again, by clicking on the different options the preview of the icon will be automatically resized according to the chosen size.
Larger variety of sizes is available by clicking on the More sizes button.
If you click on the icon again, you will get to icon details page, where you can chose the size on the same principle. We recommend SVG format for larger images or when you want to keep the quality when resizing.