Far-Easterling Longbowmen
The Longbow is a larger Bow variant. Most Longbows are self-bows, made out of only one material (preferred were Yew, Hazel, Ash, and Elm, with Bamboo being used in the southern and eastern parts of Middle-Earth). But there are also larger Composite bow variants. The Númenoreans used a special type of longbow made of hollow Steel.
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Longbows are usually as tall as the persons who use them, but there are even larger variants such as the Japanese yumi, that can be exceptionally tall, since they are asymmetrical they are among the few long bows that can be used by cavalry.The Bows in Tolkien´s writings usually are thought to be based on the welsh and English Longbow of the medieval period, although orcish bows are described as smaller and made of horn which implies a Composite design.