Scraping Multi Selects

Hi,

I am trying to scrape all product options from this website. https://www.jjroofingsupplies.co.uk/duratech-dpx-c4a-b500-550x980-centre-pivot-pine-roof-window/

The product page has a size drop down. I want to scrape every size option on all of the windows. I need the name, size and price for all types?

How do I do this?

Many thanks