Why are the thumbnails so bad? They all have a size of 1200 x 1200. When I click on the image and enlarge it it is sharp. If I go back to the article it looks better. But only in Google Chrome in firefox it always looks bad.
An example of very bad quality:
Can you send me a WordPress user? I can help you with that.
Looks like you have the images for the products configured to be 250x250px
You're right, I found the mistake. The default setting for the product images was 250 x 250px.
Thank you very much for the tip!
Glad to hear that Katrin,
Let me know if you need help with anything else.