Social Security Disability back pay will be paid in a single lump sum and will be reduced by the amount of SSI already paid for months when eligibility for the two programs overlap. The second SSI installment is due this month, but sometimes the installments are delayed.
The medium flat-rate boxes for Priority service are 13 5/8 inches by 11 7/8 inches by 3 3/8 inches and 11 inches by 8 1/2 inches by 5 1/2 inches. Shipping charges are $12.65. There is one small-size box offered for Priority service. It measures 8 5/8 inches by 5 3/8 inches by 1 5/8 inches and costs $5.95 to ship.
USPS Flat Rate Boxes are just that - boxes with flat postage rates, no matter how heavy the package is. If you're shipping heavy, small items, Flat Rate Boxes are the best bang-for-your-buck option. Keeping a supply of these around your fulfillment operations can cut your shipping costs by 50%. All of these packages are supported through the EasyPost API by using our predefined packages.