Yes I red this documentation, my doubt is that this recommendations for
Catalogue images 450×600, Single Product 555×741 and Thumbnails 149×198 have a proportion of .74 and the image are rectangular. But I want to display a square image 409×409 in a single product
What sizes should I put in the Catalogue images and thumbnails?
Thank youe very much in advance!
You may adjust layout from square to rectangle for the image block on the single product page and upload high quality picture for example 1600*1000(starting from 800*800 to 4000*4000px as upper limit which will not be loaded) . In case you will upload thumbnails you may use regenerate thumbnails plugin every time you change the resolution for your product images in woocommerce settings.