BALERS are available in 4 sizes, corresponding to the four sizes of netting, 18”, 20”, 23”, and 26”. Baler size may be determined by color code, or by measuring diagonally across the inside from corner to corner. Recommended tree sizes for the 20″ Baler is 5-7 foot, for fuller trees use a larger size. Ships unassembled in 30x30x10 inch box. Minimum assembly required with supplied bolts.