The concept I would like to make is to sell products in single copy (That is to say only one copy per product).
I have a problem with the variants. I would like to offer my customers to choose the size of their product however, if I put variants of sizes, for example 5 sizes, there is no longer a single product but 5 so it is not at all the same concept.
So my question is: Is there a solution so that once the size chosen, the product is sold out even if there are other variants?
My suggestion would not to use variants, keep the product without variants, and add custom field with the sizes you offer, you will receive custom field value in the order details.
To streamline your Size options without the complexity of managing them as Shopify variants, consider utilizing the free Easify Product Options app. This allows you to maintain a main product quantity of 1 without the hassle of variant inventories .
Let’s take the example of the Stone Ring: the quantity equals 1, representing the unique stone, while customers have the flexibility to choose their Ring Size, which is crafted on demand. To achieve this, we’ll designate Ring Sizes as custom options within the app for the Stone Ring, while keeping the Stone Ring quantity fixed at 1.