WooCommerce pages with out sidebar

Hi there!
Once again, I must say that I am totally satisfied with Blocksy.
You deserve congratulations on your work!

Please, when you have time, help me to find a solution to this:

I want to setup specific WooCommerce pages (cart, checkout, and profile) without a sidebar, but I cannot find how do to this in page settings.

Can you please help me to do this ?

Please note that I need the sidebar in WooCommerce archive pages.

Thank you
Nikos