Images on front page of shop and related images blurry

Hi,

I’ve uploaded some new product images to my page and in the product itself they show clearly, but for some reason on the shop page (showing multiple products) and in the ‘related product’ images, the image (.e.g the logo) is blurry and it doesn’t look very good. Is there a way to fix this please?

thanks

The page I need help with: [log in to see the link]