The washing drum size that is smaller is typically the top loader washing machine drum. This drum is generally smaller in capacity compared to the front loader washing machine drum. The average top loader drum capacity ranges from 2.2 to 4.4 cubic feet, whereas the front loader drum capacity typically ranges from 4.4 to 5.8 cubic feet. This difference in size is due to the design and loading mechanism of each type of washing machine.

Top loader washing machines have a vertical drum that rotates, allowing clothes to be loaded from the top. This design results in a more compact drum size. On the other hand, front loader washing machines have a horizontal drum that spins, requiring clothes to be loaded from the front. The larger drum size in front loaders is necessary to accommodate the horizontal loading and unloading process.

According to a study by the U.S. Department of Energy, the average top loader washing machine drum size is approximately 3.5 cubic feet, while the average front loader drum size is around 5 cubic feet. This data supports the general observation that top loader washing machine drums are smaller in size compared to front loaders.

The smaller drum size in top loader washing machines has several implications. Firstly, it can lead to higher energy consumption and water usage per load due to the need for more frequent cycles. Secondly, the smaller drum size may limit the number of clothes that can be washed in a single cycle, potentially increasing the overall number of loads required. However, the compact size of top loader washing machines can be advantageous in smaller living spaces or for those who prefer a more traditional washing machine design.