An easier way to "read" a windsock: count the bars until the windsock "breaks" / folds down, as per: https://patentyogi.com/wp-content/uploads/2016/03/Patentyogi...
When I started parachuting, I struggled to quickly read windsocks, because the definition of 'full' can be somewhat ambiguous (Is it mostly / somewhat / completely inflated, what if it's full now but wasn't three seconds ago..)
I'd found: See where it 'breaks' provided a much better point of reference.
Perhaps this will help others that shared my confusion :)