A method (100) and system (500) for determining a floe size distribution (350), (516) for a plurality of floes within a geographical area (204), comprising determining a chord length distribution (512) for the geographical area (204), the chord length distribution (512) comprising a plurality of measured floe chord lengths, and determining the floe size distribution (350, 516) over the geographical area (204) based on the chord length distribution (512), the floe size distribution (350, 516) comprising a plurality of floe diameters (402).