Change width of shop with sidebar

Hey there!

I’d like to increase the width of my WooCommerce shop. I googled literally through the whole internet but I only find cases where people want to get rid of the sidebar in order to full-width the shop. But I want to keep my left sidebar and increase the whole shop. But only the shop, not the whole website as such. There is a main-div but that refers to the whole website apparently.

Is there any solution?

Thanks!