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.
Small Flat Rate Box. The size of the small flat rate box is 8 5/8 x 5 3/8. x 1 5/8.. As of December 2010, the cost to ship this box is $4.95. Medium Flat Rate Boxes. There are two medium flat rate box sizes. The first is 11 x 8 1/2 x 5 1/2.. The second is 13 5/8 x 11 7/8 x 3 3/8.. Both boxes cost $10.70 to ship, as of December 2010. Large Flat Rate Box. The large flat rate box size is 12 x 12 x 5 1/2..