SEO - URL without attribute / Declinations ???

[doog_2019]

Hi everybody 😎

I am not an SEO specialist,

but I have heard that for Google, it is better to have a unique URL for a product even if the product has attributes (exemple: Size Small, Medium, Large).

In my case for a same T-shirt (on the same product sheet) , when I click on the  size selector:

Size small: http://localhost:8888/www/test/t-shirt-bmx-street/25-51-modele-logo.html#/1-taille-s

Size medium: http://localhost:8888/www/test/t-shirt-bmx-street/25-52-modele-logo.html#/2-taille-m

Size large: http://localhost:8888/www/test/t-shirt-bmx-street/25-53-modele-logo.html#/3-taille-l

 

I can see on Zalando.fr for exemple that they have the same URL even if you click on size Small, Medium etc. : https://www.zalando.fr/pier-one-t-shirt-basique-dark-blue-melange-pi922o00i-k16.html

 

Hope to have been clear in my explanations,

Thank you for your help