It sometimes seems that pomelos are everywhere in Thailand. But then, a fruit this big is quite difficult to hide. The pomelo is a very large citrus fruit, perhaps the largest in the world, and its scientific name Citrus grandis suits it well. The fruit can reach the size of a football (soccer ball for you Americans) and is pale green like an unripe orange. It has a very thick skin, inside of which is a segmented flesh exactly like an orange or other citrus fruit, only much larger. The taste is quite similar to grapefruit, only without the sourness and bitterness.