itsy-bitsy teeny-weeny

Translations
крошечный, малюсенький
She wore an itsy-bitsy teeny-weeny yellow polka dot bikini.
Она надела крошечный, малюсенький желтый в горошек бикини.
Definitions
A playful phrase often used to describe something very small or tiny, typically in a lighthearted or whimsical context.