Instagram

Portrait1080×1350

1080×1350, a 4:5 portrait. This is the everyday Instagram post size: tall enough to fill a phone, and accepted everywhere scheduling tools still cap the ratio at 4:5.

Export size

1080×1350

Aspect

4:5

Source: Instagram Help — photo resolution

How to export it

1. Open the tool and drop in the photo. It stays in this browser.
2. This preset is preselected. Drag the frame, or use Focus on detail, until the subject sits where you want it.
3. Check any other sizes you need and download. A single size saves as a file; several sizes save as a ZIP.

What the overlay is warning you about

This placement has no interface covering the picture. The whole frame is the design.