Da série “como é legal ler revistas de moda em inglês”.

Calça boca de sino:

Flares / Flare Pants (Brit.)
Bell bottom pants (Am.)

Def.: Flare pants are any pants that flare out below the knee. They are also known as bell bottom pants or wide-leg pants. There’s no one standard flare; some slacks feature a subtle flare, while others have a very wide flare. Different types of flare pants work for various body shapes.