Freight containers are standardized shipping containers. Shipping containers have standard dimensions, typically 20'x8'x8.5′ or 40'x8'x8 https://smartstore.naver.com/gil4622?NaPm=ct%3Dm9b5kfsm%7Cci%3Dcheckout%7Ctr%3Dds%7Ctrx%3Dnull%7Chk%3D0f2771eefed0bfb0c50b03e1f87462501832705f