| Open Graph | 1200x630 | Blog previews, docs pages, product pages | Use a strong title and one short supporting line. Avoid dense paragraphs. |
| Twitter / X | 1200x675 | Launch notes, thread summaries, short technical posts | Best for organic 16:9 post images. For X ad cards, also consider 1.91:1 or 1:1 assets. |
| LinkedIn | 1200x628 | Professional updates, lessons, product announcements | Use clear structure: headline, context, then three to five points. |
| Instagram Square | 1080x1080 | Quotes, lessons, short checklists | Keep the composition simple and leave enough margin for mobile viewing. |
| Instagram Portrait | 1080x1350 | Tutorial steps, longer notes, carousel pages | Use the extra height for structure, not for cramming in an article. |
| Facebook Feed | 1080x1080 | Feed posts, share cards, cross-posted Meta creatives | Square is the safest general feed format; use 4:5 when you want more mobile screen space. |