Group sizes or colors in category filter (module or code)

[miguelg]

Hi!

I am looking for some way to group sizes: for example: "36 1/4", "36 1/3", "36.5", "36 2/3" group it all into 36 in the category filters.

And if possible, the same for the colors: "sky blue", "light blue", "pastel blue", "sky blue" group everything in "light blue".

In other CMS I have seen it, but I can't find anything in prestashop.

Do you have any idea?

Thank you very much.