Instagram is the great platform but it comes up with some setbacks like you can’t upload full size picture if your image is over the instagram size standards. Here, I will let you know how to see full size photo on mobile and computer:
First you need to open instagram account by successfully login to it
After then, you need to open anyone’s account photo and click on the address bar url
And then add media/?size=l at the end of the url and then, hit the enter button
That’s it your image will open in full size.
Read more: https://allinsider.net/how-to-view-instagram-full-size-photo/