We may earn an affiliate commission from links. Tennis skirts have long been a staple of both the court and the street, but this season, they’re serving up more than just classic whites.

The piano accordion. High-profile piano accordion champions ... then she thought it would be fun to wear a swing skirt and petticoat. And as she started dressing up, people were engaging with ...

Eric Charbonneau//Getty Images Later, she wore a gorgeous Johanna Ortiz pink midi dress with a skirt slit on a visit to Centro Nacional de las Artes Delia Zapata Olivella. Eric Charbonneau//Getty ...

Enter: the bubble skirt: A voluminous, almost cartoonishly circular frock featuring a gathered and cinched hemline that gives it its titular ‘bubble’ shape. So, what is the bubble skirt?