The Rømø costume contains the following elements:

a. Pi: The red skirt and red bodice, both made of wadmal wool, are sewn together. The combined garment is called a "pi."

b. Bodice: The red bodice is edged with narrow green silk ribbons and further adorned with large round silver buttons. Arguably, the asymmetrical positioning of these buttons is the costume's most distinctive element. The use of buttons on bodices was common throughout Denmark in the 1600s and early 1700s. Over times, most Danish folk costumes replaced their buttons with hooks or pins (and occasionally laces), while Rømø kept the old tradition of buttons.

c. Blouse: A flower-printed cotton blouse is worn under the bodice instead of a knitted sweater (nattrøje). For parties, a colored silk shirt was used.

d. Headcloths: Red or green checkered North Frisian-influenced headcloths similar to those worn on the nearby island of Fanø. However, unlike Fanø, the head and neck cloths had to be different (Ellen Andersen, Danske Bønders Klædedragt, p.428).

e. Apron with metal buckle: A variety of apron patterns can be worn. The metal apron buckle in the rear is characteristic of Rømø. It has two soldered "silver buttons" on the back, which fit into a buttonhole on each side of the apron waistband (essentially, each side of the buckle buttons onto the apron waistband).