When I select an icon size, the resulting HTML output from my webpage indicates that a larger icon file image is being utilized, but reduced by “height” and “width” tags.
For instance, when I set Icon Size to 16×16, with Icon Resolution on Single, the resulting HTML is
<img alt="facebook" title="Share on Facebook" class="synved-share-image synved-social-image synved-social-image-share" width="16" height="16" style="display: inline; width:16px;height:16px; margin: 0; padding: 0; border: none; box-shadow: none;" src="http://delvers.org/wp-content/plugins/social-media-feather/synved-social/image/social/regular/32x32/facebook.png" />
With Icon Resolution set to Double, the output is identical.
Mayhaps the Icon Resolution switch in your code is stuck on Double?
https://wordpress.org/plugins/social-media-feather/