macos

resize your Safari window to an exact 1.91:1 aspect ratio

osascript -e 'tell application "Safari" to set bounds of front window to {100, 100, 1300, 730}'

PRO: perfect og:image with 112px (224px) shadow:

osascript -e 'tell application "Safari" to set bounds of front window to {112, 112, 1200, 630}'