Neurons in the dorsal root ganglia that extend to the skin and brain are among the largest cells in the human body.

“What this means is that the neuron in your body that we call the DRG that sends a wire an axon to sense what's going on in your big toe and then sends another axon in the opposite direction into the base of your brain, that is the largest cell in your entire body of any kind. Fat cell, muscle cell, nerve cell, et cetera. Is extremely long cells. It can be a meter or more depending on how tall you happen to be.”