Steps to replicate the issue (include links if applicable):
What happens?:
The sort icons are tiny:
What should have happened instead?:
They should be 16px square (icon size small):
Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia): Codex 1.8.0
This is happening on MPIC because there's a box-sizing: border-box style applied to everything via the wildcard selector, which means the icon's padding-left is included in its total size. We could change the padding to a margin to avoid this issue, and because it's more semantically correct (the space is meant to separate the icon from the label it's next to).