Tragal cartilage to Mastoid tip

9.5 ± 1.5 mm

Tragal pointer to styloid process

17.5 ± 1 mm

Posterior belly of digastric from mastoid tip to styloid process

7.5 ± 1.5 mm

Tragal pointer to facial nerve trunk

13 ± 1.2 mm

Posterior belly of digastric to facial nerve trunk

6.5 ± 0.5 mm