I recently had need to redevelop the social icons for my personal site. Started with Super Tiny Icons, changed viewport to 96 sq then resized and compressed accordingly. All of them came out slightly smaller, though I wouldn't vouch for comparative accuracy, but good enough: https://codepen.io/2kool2/pen/ExNpjBL/left/ Github comparison STI: Mine: Twitter comparison STI: Mine: I believe this decrease is mostly due to using a maximum 2 digit viewport (0 0 96 96). Plus any benefit from using an readily divisible number (96 rather than 99 or 100).