What is the approximate length of a giraffe's tongue?

Giraffes’ tongues are about 18-20 inches long and they use their prehensile (capable of grasping) tongue and the roof of their mouths in order to feed on a range of different plants and shoots, most notably from Acacia species. Africa’s Acacia species have fierce defensive thorns, requiring a giraffe to use its dexterous tongue to sort out the nutritious leaves from spiky thorns. Fortunately, a giraffe’s tongue has thickened papillae, which helps to protect it from these vicious thorns. Additionally, thick saliva is also believed to help protect giraffe’s tongue and mouth against the defensive mechanisms of their favorite food. Acacia leaves are a good source of water which helps giraffes go without drinking for long periods on time. The color of the tongue is best described as black, blue or purple with a pink base/back to protect it during frequent sun exposure while eating and prevent the tongue from getting sunburned.