1. A method of infeeding items to a palletizer, each item having a leading edge and a trailing edge, the method comprising the steps of: a. delivering an item to a conveyer in a predetermined orientation and moving the conveyer and the item at a first speed; b. detecting the position of the item leading edge with a leading edge sensor; c. engaging the item trailing edge with a pusher bar that defines an item trailing edge sensor and which extends over the conveyer, moving the item with the pusher bar and detecting the position of the pusher bar with an encoder associated with a drive mechanism that moves the pusher bar; and d. determining a dimension of the item as the distance between the detected position of the item leading edge and the detected position of the pusher bar.