First, you should browse the product page where you want to purchase.
And then please click the product photo.
We have assumed the order quantity is 1. Please revise by yourself if the quantity is incorrect.
Please press "Add to cart" after confirm the quantity. Otherwise, please click "Continue shopping".
You can check your "Cart" at top right side if there are any selections.
Finally, you can re-check your selections via the checklist. And please click "Checkout" if there are no any changes