House Dust Mite

Size
The body of a house dust mite is just visible against a dark background in normal light. A typical house dust mite measures 0.4 millimetres (0.016 in) in length and 0.25–0.32 millimetre (0.0098–0.013 in) in width. Both male and female adult house dust mites are creamy blue and have a rectangular shape. The body of the house dust mite also contains a striated cuticle. Like all acari, house dust mites have eight legs (except 3 pairs in the first instar).