Size and Capacity:
2x Oversized: 20 * 29 cm/7.87 * 11.41 inches,can carry 80 pounds (36KG);
2x Large: 20 * 20.5 cm/7.87 * 8.07 inches,can carry 60 pounds (27KG);
2x Middle: 14.5 * 11.5 cm/5.71 * 4.53 inches,can carry 40 pounds (18KG);
2x Small: 13 * 8 cm/5.12 * 3.15 inches,can carry 20 pounds (9KG)