Main image width: this is the width of the main image on the product page. The theme will automatically regenerate images of the right size without cropping the images. You can resize them at any time.
Thumbnail width: this is the width of the product image on archive pages like Shop page, category pages etc.
Thumbnail cropping:
- 1:1
- Custom: you can enter your own ratio here
- Uncropped: images will use their original ratio