Provides guidelines based on two sets of plan view dimensions for unit load that are compatible with Australian distribution systems. The first set of dimensions is based on transport and handling equipment designed to accommodate the 1165 mm x 1165 mm pallet, which is widely used for domestic freight movement. The second set is based on the 1100 mm x 1100 mm pallet and is suitable for use in ISO Series 1 general purpose freight containers. Does not preclude the use of other plan view dimensions which may be necessary to suit specific requirements of some part of the total distribution system. Ways of improving modularity of package dimensions are described.