Hi, I am not from the coding background, therefore it seems difficult to get this easy work done.
So basically, need the sizes variant to show available and unavailable sizes above the add to cart button. Currently Its a drop-down.
Currently Looks like this
Need it to look like this:
Thanks in advance for the help.
Which theme you are using ? If possible please share your site URL.
Well its customization part you have to do custom change in theme.
I am sharing a link hope this will help you a bit.