how big are lice

Adult head lice are tiny, usually about the size of a sesame seed: roughly 2–3 millimeters (around 0.1 inches) long.

Quick Scoop: Size of Lice

• Adult head lice: About the size of a sesame seed, roughly 2–3 mm long (around 1/16–1/8 of an inch).

• Nymphs (baby lice): Much smaller, from about 0.5–1.5 mm, often just a “moving speck” to the naked eye.

• Eggs (nits): Oval, stuck to the hair shaft close to the scalp, about 0.8 mm long (similar to a tiny knot in a thread or a grain of sand).

Because they’re so small and cling to hair, lice and their eggs are very easy to miss unless you part the hair and look very closely under bright light or with a fine comb.

Information gathered from public forums or data available on the internet and portrayed here.