Applies only to Half.com. Indicates the number of orders that can be returned per page of data (i.e., per call). This is the same as the value specified in the Pagination.EntriesPerPage input (or the default value, if EntriesPerPage was not specified). This is not necessarily the actual number of orders returned per page (see ReturnedOrderCountActual).
See the
Field Index to learn which calls use OrdersPerPage.