Instagram square post size
1080 × 1080 px · 1:1 · post
1080 × 1080
The details
Classic 1:1 feed post. Instagram keeps your original resolution when the width is between 320 and 1080 pixels; wider uploads are downscaled and anything under 320px wide is upscaled and can look soft.
Source: help.instagram.com · checked 2026-07-04