my business sells pre-owned rings (jewellery), which we resize to the customer's ring size following a purchase. We would like to add a drop down menu of ring sizes on each product page so that customers can select the size they would like. As far as I can see, drop down menus can be added for product variants, but I don't think these will work in our case, as our products are one of a kind (quantity = 1) rather than having 5 available in Size A, another 5 available in Size B and so on. Is there any way to include a drop down menu in this way?
Creating required variant is the best option to deal with this, however in case you are likely to exceed the 100 variant limit and you have multiple custom options, you can add them using line item properties.
If you want to do it yourself you can try the tutorial below