- 17 centimetre(s)
- Japan (Tokyo)
The longest eyelash on a dog is 17 cm (6.69 in) and belongs to Ranmaru (Japan), an Australian Labradoodle, as measured in Chuo, Tokyo, Japan, on 4 September 2014.
Ranmaru's right eyelash was measured. He was 3 years 8 months old as of September 2014.