The blade is six feet long, slightly curved and a handspan wide. It has wavelike serrations near the hilt, and is curved like a fisherman's hook near the tip.
In summoning Oathbringer, the tenth heartbeat sounded in Dalinar's chest; he could always hear the beats when he was summoning his Blade, no matter how loud the world around him was. The faster they passed, the sooner the sword arrived. So the more urgent you felt, the sooner you were armed. Was that intentional, or just some quirk of the Shardblade’s nature?
Although Oathbringer was then in Sadeas' possession, the Blade currently lies at the bottom of the tower of Urithiru, given that Adolin has since murdered Sadeas and then proceeded to throw Oathbringer out a window.