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The bisexual flag, one of many LGBTQ+ pride flags, symbolizes and celebrates the sexual orientation of bisexual persons in the United States and other countries. It is widely flown and displayed in parades and other public events by bisexual persons and their friends, families, and supporters.

Created in 1998 by the bisexual activist Michael Page, the flag consists of three horizontal stripes in different colors. The top and bottom stripes, each of which is just as wide but twice as tall as the middle stripe, are respectively pink and blue, and the middle stripe is purple. (The different sizes of the stripes reflect a then-popular bisexuality symbol consisting of two triangles, pink and blue, intersecting in the shape of a smaller purple triangle.) The pink stripe represents same-sex attraction and the blue stripe opposite-sex attraction, while the purple stripe, in both its position and color, signifies their overlap or combination in the form of bisexuality.