But they may be resized or cropped to fit the supported resolutions and ratios:Instagram post size resolution: From 320 to 1,080 pixels wideFrom 320 to 1,080 pixels wide Instagram post size ratio: Between 1.91:1 and 4:5Option 1: Upload One ImageTap the photo you want to post to Instagram. Publish or Schedule Your PostTo publish your Instagram post immediately, tap “Share” or “✓” in the upper-right. To schedule your Instagram post for later, tap “Advanced settings” > “Schedule this post.” Select a date and time up to 75 days in advance, then tap “Set time.”Go back to the “New post” page then tap “Schedule” to confirm your post. Note: You must use the mobile app and have a Professional account to schedule Instagram posts like this. Next, decide when your Instagram post should be published:Post now: Publish your post as soon as you confirmPublish your post as soon as you confirm Schedule: Schedule your post for a set time in the future—use the toggle and copy the secret link if your “Post needs approval” firstSchedule your post for a set time in the future—use the toggle and copy the secret link if your “Post needs approval” first Publish regularly: Republish your post at a regular intervalRepublish your post at a regular interval Save as draft: Save your draft in Semrush and work on it laterCheck the “Calendar” on the right to see where the post fits into your social schedule.