Very small, tiny, or miniature.

"Itsy Bitsy Teenie Weenie Yellow Polka Dot Bikini" is a novelty song telling the story of a shy girl wearing a revealing polka dot bikini at the beach.

"The Itsy Bitsy Spider" (also known as "The Incy Wincy Spider" in Australia, Great Britain, and other anglophone countries) is a popular nursery rhyme, folksong, and fingerplay that describes the adventures of a spider as it ascends, descends, and re-ascends the downspout or "waterspout" of a gutter system or open-air reservoir.