what the best file size to use when resizing photos,im using resize image which is making my photos squashed.
It would help to know what editing software you are using to resize the image with?
And whether you are cropping the photos before resizing the image, with a constraint to set dimensions (example; 800x600) ? Rather than resizing unconstrained, where you only set one dimension (example; longest side set at 800 ) and accordingly retain the photographic aspect automatically.
I am not familiar with Adobe Photoshop Lightroom Classic 8.1, but if you are using it to crop & resize (as the uploaded file data suggests) there maybe a Aspect Ratio lock that needs presetting or resetting as part of that process for each individual shot you edit ?
Hope this helps