Adult Mediterranean flour moths are ¼ to ½-long with a wingspan of a little less than 1 inch. The forewings are pale gray with wavy black lines running across them. The hind wings are dirty white. When the adult is at rest it pushes up with is front legs, making the wings look like they slope downward. The larvae are ½ to 2/3-inch long when fully developed. They are white or light pink with a dark head.