Facebook Image Post Generator

Facebook Post Size Guide: 3:4 vs 1:1 — Which Should You Use?

The Image Post Generator gives you two size options for a reason — 3:4 and 1:1 aren't interchangeable, they just behave differently depending on where and how your post gets seen. Here's how to pick in under a minute.

3:4 (Portrait)

• Taller frame — claims more vertical space as someone scrolls past it
• Default size for most headline-style news and announcement posts
• Gives a heading + sub heading more room to breathe without shrinking the type
• Works best when your background photo has a clear vertical subject (a building, a person, a product shot)

1:1 (Square)

• Balanced frame — reads the same whether someone's scrolling fast or slow
• The long-standing standard for feed posts across most platforms
• Better fit for wide or horizontally-composed photos (landscapes, group shots, product lineups)
• Easiest to reuse the same image across multiple platforms without re-cropping

A quick decision table

The one rule that matters more than the size itself

Whichever you choose, keep it consistent across a series of posts from the same page. A feed that alternates randomly between portrait and square looks unplanned — picking one and sticking with it (at least within a campaign or week) reads as more deliberate, even if the "correct" choice honestly isn't that deep.

In the Image Post Generator, this is a one-click toggle under Image Size — change it anytime and your heading, sub heading, and photo crop all adjust automatically, so it's genuinely free to try both before deciding.