carbon steel plate packing:Waterproof paper + Metal Pallet or as per customers' requirements. The inner size of container is below: 20ft GP: 5.8m(length) x 2.13m(width) x 2.18m(high) about 24-26CBM,23MTS 4 0ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high) about 54CBM,27MTS 40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high) about 68CBM,27MTS.