Watercolor Pear Linen Pillow 20" x 20" Hidden Zipper in Back Knife Edge Finish There are over 3000 different kinds of pears grown in the world with the majority of the US pears grown in Oregon, Washington State and Northern California. Bartlett pears are the most popular. Surprisingly, the pear tree can grow as high as 49 feet with a pyramid shaped top. Pear wood is used in the construction of architect's rulers, musical instruments, furniture and sculpture.