The first decade of the 1600s witnessed some tall coiffures as shown in this image.
This image is from royaltyguide.nl. According to that site, she was the first of three wives of Duke Johann Albrect II of Mecklenburg-Güstrow.
This is reminiscent of images of Anne of Denmark with high coiffure, a scoop neckline, a bertha, and a ruff unconnected to the rest of the gown ("floating" ruff). The lace ruff appears to rest on a gauzy support, perhaps heavily starched. Her sleeves may be tabbed with rows of pearls concealing the gaps between the tabs. It looks like she is carrying six strands of pearls the way a mountain climber carries rope.