The maximum weight that is allowed is around 70 pounds. The prices are directly proportional to the size of the box. There are small, medium and large sizes of boxes at USPS flat rate. Get a flat rate box of required dimensions, that will help you fit in all the necessary items for your customer.In order to ship using flat rate, follow these steps: It also depends on how much stuff you can pack in the flat rate boxes issued by USPS. Note that the flat rate means that the shipping charges are not connected to the shape, weight or size of the shipping item. No surcharges for delivery: USPS Flat rate shipping does not charge you for any shipment.Priority delivery: It is important to note that priority packages also get special consideration while delivering.Hence no surprise costs for your shipping. Known and fixed prices: On USPS, the shipping box dimensions are fixed and the price too.Here are some specific features that make USPS flat rate boxes ideal : Even flat rate shipping works well with certain brands where the shipping cost is inevitable. When you consider shipping costs based on distance or even dimensional weight which is again calculated on the basis of the dimensions like width, height, weight, etc. If you see, flat rate shipping is the most affordable way of shipping, when you consider eCommerce. Why is flat rate shipping best for eCommerce?

The weight of the package is the prime factor that determines the shipping costs, which is ideal for all online stores. In order to improve the customer’s shopping experience and reduce shipping costs, USPS offers flat rate boxes and envelopes for online stores. How to integrate flat-rate shipping using ELEX WooCommerce USPS Shipping Plugin with Print Label.

Why use flat rate shipping for eCommerce?.

Why is flat rate shipping best for eCommerce?.

Usps flat rate box medium