█ ▌SizeThe most noticeable titan trait is their size, by which the military classifies them. Seeing as nobody is 3DMGing with measuring tape, estimates are often given when describing a titan, ex.: "An 8-14 meter class titan has set foot on Carla street." The smallest titans are approximately 3 meters tall, and the largest about 15 meters tall.
Smaller titans (
3-5m) can enter through smaller gaps and be more agile in tighter spaces, such as tunnels and buildings. Anything over 3m class is too big to duck into doors and crawl through large windows, though a 4m may be able to crawl through a door, and a 5m to reach into it though not as far as a bigger titan. They have the strength to break through glass and wood, but not the brick and stone of some buildings. It is possible for a human to reach their critical weakness in the nape of their neck without the use of a 3DMG.
Mid-range titans (
6-10m) begin to tower over buildings, and are stronger with a longer reach than their smaller brethren. At this point it is very difficult and unlikely for a human to be able to reach their nape without the aid of 3DMG.
The largest titans (
11-15m) are rarer than the other types but they tower at the level of or even taller than multi-story buildings. They are strong enough to break through rock should they make a dedicated or accidentally high momentum motion.