Customs won’t have a sku on them because they are made per customer but I think they will have the made in usa (assuming they were) and they still should have measurement. Someone correct me if I’m wrong so don’t quote me.The guy that I bought them from says he worked at the Oakley store and they were customs. He swears they are authentic. He said the customs don't have the same markings as the pre made ones. He seems very sincere but I don't want to get taken for my money.