Postal scales need not be for just large offices. Small businesses can greatly benefit from the use of them as to can small mail order businesses or Ebay sellers. Postal scales not only eliminate the need to queue at a Post Office branch but should postage costs need to be worked out prior to a sale going ahead, the correct cost can be calculated and given to the purchaser or client. Postal scales can be used to calculate the postage cost of an envelope right up to a package.