There is a new product up on Copernicus with floe size distribution derived from Sentinel-1 SAR imagery and passive microwave.
There is a long dataset with good coverage in the Arctic:
And they have processed what they can in the Antarctic but its limited both in time (only 2 years) and looks like it has spatial gaps.
Could be useful datasets for validatining sea-ice+wave models , including marginal ice zone width and floe size validation ![]()
ping @adfraser @NoahDay