image hover small change in picture

Hi!

I love the plug in – but I’m having trouble resolving the problem of the slight change of size of the picture (main / 1st thumbnail) – which is the same picture – but repeated.

I can’t seem to resolve this small change of size – while the picture is exactly the same – and that is a very huge problem, since my client really needs the pictures to be their main selling part here (attached the URL to the products when hover on thumbnails: http://seemsoap.fr/produit/seem-soap-savon-patience-numero-2/ )

Please let me know if someone knows how to resolve!

Thanks!!!
Aurelia

https://wordpress.org/plugins/woocommerce-image-hover/