I would like to add a custom size to our product variants (our sizes are like 80x300cm or 160x230cm or ...) which the width to be 80cm fix and the length to be variable for the customers to type .
So we need a new box for customer's custom size .
Can you please help me to edit coding theme to add this variant
There is a guide on how to do this here https://community.shopify.com/c/Shopify-Design/Product-pages-Get-customization-information-for-produ...
Hope that helps.