Mailing machine including dimensional rating capability

A mailing machine comprising a device for feeding an envelope having a width in a path of travel; a device for determining the width of the envelope; and a control device in operative communication with the determining device for using the width of the envelope to ascertain a proper amount of postage to be applied to the envelope. According to a first embodiment, the determining device includes a sensor array located transverse to the path of travel for detecting the presence of the envelope where the sensor array includes an inner plurality of sensors and an outer plurality of sensors located further away from a registration wall than the inner plurality of sensors. According to a second embodiment, the determining device includes a first sensor for detecting a lead edge of the envelope and a sensor line located downstream in the path of travel from the first sensor and at an angle to the path of travel so as to detect a lead corner of the envelope.