how to post long vertical photos on instagram

I do specialize in math but I can provide some assistance on this matter. Instagram limits the aspect ratio of posts. For vertical images, the maximum aspect ratio is 4:5. That means the height of your image should be 1.25 times the width. So first, check the dimensions of your photo.

In that case, you'll have to resize your photo or crop it to fit the 4:5 aspect ratio. Remember, the purpose is to have the height of your image 1.25 times the width. You could use apps like 'InShot' or 'Instasize' to resize or crop your photos appropriately.

Once you open the Instagram app, click on the '+' button at the bottom center to start a new post. Select the photo you want to post and click on 'Next'. If you need to adjust the size, you can use the 'pinch to zoom' method. Finally, click 'Next', apply any filters or edits as you desire, and then click 'Next' again to write your caption, tag people, and then tap 'Share' at the top-right corner.