How to put a red cross on out of stock sizes?

Hi all,

Just looking for a bit of code - that puts a red cross through the verient (XS/S/M/L/XL) when the item is out of stock - to help speed up the customers selections process.

@Lwilden
Hii,
Its Customization and Time Spending Work.
Can You Please Share Store URL and Store Details…
I Will Check Code Then After Provide Proper Solution
Thanks