Utilizing the disclosed techniques, automatic item replenishment decisions may be made based on whether or not an item entirely fits on/in an automatic replenishment device (ARD). For example, sensor data associated with an item and an ARD may be received. The sensor data may indicate that an initial amount of the item is in contact with the ARD. A measurement value may be calculated that quantifies the initial amount of the item that is in contact with the ARD. Subsequent sensor updates may be monitored to determine various amounts of the item that are in contact with the ARD. Based at least in part on the measurement value and the monitoring, it may be determined that a surplus amount of the item exists that is external to the ARD. Decisions on whether to generate an automated order for the item may be based on the existence of the surplus amount.