recommended size image shopitem

You’ll want to use some decently large images for your products. The demo uses images this size for a good display on all devices:
https://themes.kadencethemes.com/virtue/wp-content/uploads/2013/07/tshirt-mockup-1a.jpg

-Kevin

Thank you Kevin, the image size in the demo is 893×893 pxls. Ours are even smaller on this page: https://tegelshopnijmegen.nl/product-categorie/maandactie/

It takes so long before the pictures from a specific product load.
I allready minimized the images..can it be something else? Do you have a suggestion?

There are a lot of contributing factors when it comes to page speed. It looks as though you’re not using any caching, and that will help a lot with page speed.

I suggest reading this post:
https://www.kadencethemes.com/need-for-speed/

It goes over some important page speed factors and you should find it helpful.

-Kevin