How does Flat Rate select work?

Flat Rate Select is exclusive to ReadyShipper shipping software. Each license connects you directly to the discount USPS shipping prices your business needs to better compete with other online stores. Flat Rate Select is currently available through Stamps.com and Pitney Bowes shipper accounts.

Until just recently, the special pricing on flat rate discount USPS shipping was only available for businesses that were shipping more than 50,000 shipments annually. Now you can take advantage of these cost-savings without the contract! Shipping costs are a big pain-point for many e-commerce businesses. Since packages can often differ in size and weight, this can mean that shipping costs can be difficult to predict, making it harder to know what the actual bottom line is.

With Flat Rate Select discount USPS shipping from ReadyCloud, you can base your shipping prices on the size of the box, and not worry about the weight, knowing you will get the cheapest shipping cost every time. ReadyShipper will show you how the price stacks up against other flat rate shipping prices. Now you can make the best decision every time and help predict your future shipping costs while getting the best discount shipping rates.


For a box to qualify for Flat Rate Select, it must meet the following requirements:

  • Weigh no more than 20 pounds.
  • Have a longest dimension of no more than 18 inches.
  • Measure no more than 0.5 cubic feet. USPS uses the following formula to measure cubic feet: Length x Height x Width / 1728 = Cubic Feet

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