Shapely portfolio projects widths different for individual project

Good Evening
I have eight projects at present in portfolio and shapely have put four in each row. I want to add another one, but shapely does not take full width so it fit nicely under eight projects taking full width of screen. Is it possible to set the width to take full screen width?
the url is https://www.ioteach.co.uk and portfolio section is called ‘our products and services’.
Many thanks,
Jacob