How to make cart buttons lined up without depending on title of a product?

Have you gone to Woocommerce/Settings/Catalog? If you want your images to be a specific size you have to choose ‘hard crop’. Otherwise you have to upload your images basically the same size. From https://docs.woothemes.com/document/adding-product-images-and-galleries/ ‘if your settings are 100×100 and you upload a 300×600 image it will be resized to 100×200’

Try uploading new identically sized images to see if that works. If you just change the settings on existing images nothing much will happen unless you regenerate thumbnails.

Yes, ticks are already put on ‘hard crop’, but it didn’t bring any changes.

There are the same pictures at the site of my partner with different sizes of images and ‘add to cart’ buttons stuck on the same level somehow.

I regenerated thumbnails btw, and still nothing.

If i have to upload all the images again with the necessary size… there’re more than 500 images. I’d better leave it this way.

I think,no – i hope, there must be smth that will line up ‘add to cart’ buttons.

I think my suggestion would be to upload four copies of the same image – i.e. identical – to the page that the screenshot shows, just as a test. I suspect that you have images of different proportions. The image will always fit into the width that is set. The height will then adjust accordingly. You might have to resize and then re-upload those images that don’t line up – there was one out of four in the screenshot.