Open Graph (OG) Image Size Guide
The image that appears when your link is shared on iMessage, Slack, or Twitter.
1
1200 x 630
This is the universal standard. **1200x630 pixels** works for Facebook, Twitter (Large Card), LinkedIn, and Slack.
2
File Size
Keep it under **5MB**. WhatsApp sometimes fails to load previews larger than 300KB, so aggressive compression is recommended for global sharing.