What does a dog tick look like? – The color and size may depend on the type, the gender and stage in its life cycle. The color may also change after a tick has fed and has become engorged. Most ticks in nymph stage are about the same size as a poppy seed (1.5mm) while the newly-hatched (larvae) measure about 0.5mm and look just like a grain of sand.
An adult female tick is about 3mm (about the same size as a sesame seed), flat and oval in shape but could grow to almost 11mm after feeding and could swell like a miniature balloon. Male ticks are generally smaller than female ticks, about 2.5mm.