Shop

Nine multicolor undersea cutouts per package: sea horses, conch shells, and starfish in sizes from 9.25 inches up to 5 feet 7 inches, which is taller than some of the people at the party. The big piece anchors the wall; the small shells fill the gaps around it.

They’re printed on thin plastic, which keeps them light and makes decorating straightforward, whether that’s a full backdrop or scattered scenes around the room. Sold by the package (9 props) or by the case (54 props).