Good Morning Annamaria! We are asking the designer and getting back to you shortly with an answer! Thank you :)

Hello Anna-Maria, the stools are from Mariette Clermont http://www.marietteclermont.com/en/

Here is the exact product:
http://www.marietteclermont.com/en/products/ice-tabouret-pivotant-et-ajustable#

Thank you so much!