How can I add a strike through on a sold out size variant in Capital theme?

Store Design
1

I’d Like to add a strike through on a sold out size variant on my store. Im using the theme ‘Capital’

any help would be appreciated.

This is what I’m looking for

1.PNG

2

Hi @ProsperityAU

Would you mind sharing your store’s URL so we can have a look at this?

3

My Store URL is Prosperityau.com Thanks