Ear Width

Definition Width of external ear (pinna).

Landmarks Measure transversely from the anterior base of the tragus, which can be palpated, through the region of the external auditory canal to the margin of the helical rim, at the widest point (Fig. 7.58).

Instruments Tape-measure, calibrated transparent ruler, or calipers may be used.

Position The head should be held erect (in the resting position) with the eyes facing forward.

Alternative The infant or young child may be lying prone with the head tilted to one side.

Remarks Normal ear width is shown in Chart 7.59. Ear width changes little after 10 years of age.

Pitfalls The observer should be careful to take this measurement in the transverse dimension, otherwise, a falsely elevated value will be obtained. With cupped or protuberant ears, the most accurate measurement is obtained with the ear pressed firmly against the head.

Figure 7.58 Measuring ear width.

5 6 7 8 9 10 11 12 13 14 15 16 Age from birth (years)

Figure 7.59 Ear width, both sexes, birth to 16 years. From Goodman and Gorlin (1977) and Farkas (1981), by permission.

5 6 7 8 9 10 11 12 13 14 15 16 Age from birth (years)

Figure 7.59 Ear width, both sexes, birth to 16 years. From Goodman and Gorlin (1977) and Farkas (1981), by permission.

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