Brooks Nader and her sisters unwrapped a few gifts for fans this weekend … their legs, which they showed off in some tiny black dresses.

The Sports Illustrated swimsuit model stepped out in Greenwich Village Friday night … walking around the area where Brooks was hosting a holiday bash for their friends and fam at her new house.

Brooks kept warm with a brown fur-looking coat wrapped around her shoulders … though we guess her legs don’t get cold because she only covered them in thin black stockings.

Nader’s sister Grace wore a similarly short outfit … grinning wide for the camera when she arrived at her sister’s pad.

Sarah Nader added an individual touch to her outfit … adding a splash of silver with her shirt to the otherwise black ensemble. She left quite a few buttons open — revealing she decided to go sans bra for the afternoon.

The Nader family’s a close one — ya have to be to shooting a reality show together like they do. The ladies’ parents Breaux Nader and Holland Greene Nader also attended the event, we’re told.

Brooks posted a few pics from the swanky affair … flaunting the catering, the Casamigos cocktails … and looking as hot as the roaring fire in the fireplace.