New to Shopify, in a school uniform shop environment, how can i see all the purchases by size of a customer, without having to open every order placed, previously on MYOB, i could see all the purchases by item/size listed under each parent.
I'm not sure of a way to do it in admin, unless you can use the search function.
If you don't find a way to do it in the admin, another idea you could do is tag all the orders with the size they ordered, then filter by tag. You could test that by tagging a couple orders from different customers, then filter by tags and try to get a good flow for sorting customers and their tagged orders (from either the Orders page or Customers page).
If you wanted to automate the tagging process you can use an app like Order Automator to create tag rules then execute a batch job to tag all those orders (and / or customers).