I'm pretty sure every one knows what Elektra looks like.
But just in case, when Elektra first appeared in Daredevil #168 (November 1980), she wore this classic outfit:
And she's worn that pretty much ever since. There have been some variations, such as this white version she wears on occasion...
...and Ultimate Elektra wore a black outfit similar to the 2003 film version (I can't confirm whether the Ultimate version was based on the film version)...
...but mostly it's been the all-red outfit, to the point where one of the biggest complaints fans had against Daredevil (2003) was that Elektra didn't wear red. (They fixed this for the Elektra solo film, which is the only thing they got right.)
Daredevil season 2 (2016), however, has Elektra wear a more practical outfit with a mix of black and red:
This month, Marvel gave Elektra her own series, and Elektra #1 (February 2017) features a suit that, while clearly more comic-booky than the Netflix, is clearly inspired by it:
I don't think that the series will go farther than that and give Elektra a French-Cambodian heritage, but stranger things have happened.