There are three points to choose the right size:
Different delivery addresses depend on different shipping method.
The Priority is direct mailing and standard flat shipping:
Parcels are usually delivered to your mail box or local post office.
Expedited Shipping Service (DHL,UPS,TNT,FEDEX...):
The Parcels are usually delivered to your home and the shipping list must to be signed by the receiver.
Yoins provides delivery service all around the world, you can check your country in the list when input the country name in the checkout process. The delivery time depends on the country you live in and the shipping method you chose for your order. Normally, it takes 7-25 business days by flat shipping, 7-16 business days by priority air mail, 5-8 business days by expedited shipping service.
The shipping fee depends on your country. You'll be able to see the available delivery services and shipping fee on the shopping bag. Normally, If your order doesn't qualify for free shipping, you will pay US$2.99 for Standard Flat Shipping, US$4.99 for Priority Direct Mail and US$9.99 for Expedited Shipping.
You can choose your preferred shipping method during the checkout process. Such as Expedited Shipping Service, Priority Direct Mail, and Standard Flat Shipping. If order amount over US$50, you will be free for Priority Direct Mail for most countries.