by JS Morisset on WordPress.org
Ridiculously Responsive (SVG) Social Sharing Buttons for your content, excerpts, CSS sidebar, widget, shortcode, templates, and editor.

WPSSO RRSSB example showing buttons enabled in the CSS sidebar, content text, and widget.
Ridiculously Responsive Social Sharing Buttons automatically resize to their container width, so they always look great on any device (phone, tablet, laptop, etc.), no matter its size or resolution – including mobile, Retina, and high-PPI displays!
Include responsive social sharing buttons in many locations:
Provides UTM medium, UTM source, and UTM campaign values for each social sharing button.
A stylesheet editor allows you to easily fine-tune the CSS for each social sharing button location (content, excerpt, shortcode, widget, etc.).
Includes CSS and JS libraries provided by the RRSSB project on GitHub.
WPSSO Ridiculously Responsive Social Sharing Buttons (WPSSO RRSSB) is an add-on for the WPSSO Core plugin, which creates extensive and complete structured data to present your content at its best for social sites and search results – no matter how URLs are shared, reshared, messaged, posted, embedded, or crawled.