Images not to scale

Trying to upload a new product onto my site but the images aren’t the same size as the previous images that’s already uploaded on site.

I have edited the image to the size of the fist images I used but still the same error, I have also tried to change general WP settings as well as WC settings but no changes to the new images…

I need to up load my new products so clients can buy them but with the way it appears make my site look cheap and unattractive

PLEASE HELP FIX ASAP…