Instagram allows portrait format posts at a 4:5 ratio and 1080x1350 is the exact pixel count for that format. Portrait posts take up more vertical space in the Instagram feed than square or landscape images, which means they occupy more of the screen when someone scrolls through their timeline. Brands and creators who want their feed posts to have maximum visual impact without going to a full story format use 1080x1350 as a deliberate choice. The platform accepts this ratio for standard feed posts and it displays cleanly on both mobile and desktop without any cropping or padding.
How to Resize an Image to 1080x1350
Enter 1080 in the width field and 1350 in the height field. This is a portrait format with a 4:5 ratio. Turn the Maintain Aspect Ratio checkbox off before processing. Images that are not already in a 4:5 portrait ratio will not produce a clean 1080x1350 output with the checkbox left on.
Portrait photos with the main subject centered vertically fit this format naturally. A landscape photo forced into this taller frame will lose significant content on the sides. For a batch of Instagram portrait posts, upload everything at once and download as a ZIP when done.
Common Uses for 1080x1350 Images
Instagram feed posts in portrait format are the primary use case. Content creators and brands who want posts that take up more screen space in the feed specifically prepare images at 1080x1350 to maximize visibility. Fashion photography, food content and portrait style imagery all translate well into this vertical format.
Pinterest pins also benefit from portrait format content and 1080x1350 fits within the aspect ratio ranges that perform well on the platform. Vertical digital advertising placements that are slightly less tall than full story format also use this dimension.
Output Format at This Size
JPEG works well for photographic Instagram content at this size and keeps file sizes manageable for mobile upload speeds. PNG is the better choice for illustrated content, graphic posts with text overlays and brand template images where clean edges matter more than file size. WEBP is not typically needed for Instagram uploads since the platform handles its own compression regardless of the input format.