First packed with the carton then fixed into the pallet or plywood case.
Rubber flooring tiles loading condition for your kind reference.
500*500*15mm can be loaded with 5200 pcs in one 20' container.
500*500*50mm can be loaded with 1980 pcs in one 20' container.
1000*1000*10mm can be loaded with 2000 pcs in one 20' container.