初次订单英语

可以这样翻译： I would like to know what size of the shoes you want (small, large) and how many? (我想知道你要什么型号和数量)Please send us a purchase order. We will tell you when we can send you the products.先给我们订单，我们会回复交期。希望能帮到你，满意请采纳，别忘了点个赞!

Our first order is not very smooth operation 希望能帮到你