Intravascular filtering devices for placement within a blood vessel are disclosed. An intravascular filter in accordance with the present invention may include a plurality of elongated filter legs biased to radially expand from a collapsed position to a conical-shaped position when deployed in a blood vessel. Each of the filter legs may include a hook region configured to engage the vessel wall. The filter legs may vary in length and/or cross-sectional diameter. In certain embodiments, the dimensions and/or orientation of the hook regions can be configured to allow the filter device to be collapsed into a relatively small introducer catheter or sheath.
