Hey @FRNZCLUB ! Most, if not all, back in stock alerts apps on Shopify can help you with this. We have this on Stoq too - one of Shopify’s top rated apps for back in stock alerts and preorders.
- We make it super simple to add a “Notify me when available” button to your out of stock products and it will only appear on variants/sizes that are out of stock. It’s literally as simple as enabling the App embed.
- Our team can also add some custom changes so the “Add to cart”/“Sold out” button is hidden for out of stock variants. That way, when customers click on an out of stock size, they only see the “Join waitlist” button and nothing else.
We have a generous free plan and 24*7 support round the clock. I’d love to help in any way I can, so hit us up on live chat!