Which tooth is usually the largest of all teeth?

The first molar is typically the largest of all teeth in the human dentition. This is due to its design, which includes a broader and larger occlusal surface that is essential for effective grinding and chewing of food. The first molar's size is also a key characteristic, making it distinguishable from other types of teeth.

Molar teeth, in general, are larger than canines and premolars due to their primary role in mastication. The first molar usually has a greater number of cusps and more complex anatomy, allowing for a more significant surface area to process food. This is important for the breakdown of food before it is swallowed, aiding digestion.

In contrast to the first molar, canines and premolars are typically smaller and have different functions, such as tearing and holding food. The second molar is also large, but it does not quite match the first molar in size and prominence. Thus, the first molar’s role and dimensions establish it as the largest tooth in the oral cavity.