The most common moving box size is the standard "medium" box, also known as the 52 Litre box. Its dimensions are typically around 406mm(W) x 298mm(L)  x 431mm(H). This size strikes a balance between accommodating various household items and ensuring the box remains manageable and easy to lift during the move. It's suitable for packing books, kitchenware, clothing, small appliances, and other moderate-weight belongings. Consider using the larger 104 Litre boxes for lightweight, bulky items and smaller boxes for heavier items to ensure safe and efficient packing.