Hello,

You have set “thumbnails” as an image size. https://monosnap.com/file/KdFAwXbHsyz2vfYf0MevPSO29dRtYo (150х150) This is the reason product do not look as before.

Please replace it with 70×70 and regenerate the thumbnails with this plugin: https://wordpress.org/plugins/regenerate-thumbnails/

If you have any questions please feel free to contact us.

Best Regards