2D slices in the XY plane of the final core formed from the collapse on 39 au normalized in units of R_c. The z-dimension has been flattened to one percent of the core radius. Pebbles are indicated with the circles and scale from smallest circle to largest circlewith St_min, St_max resp. Top left panel: core structure for R_c = 1 km. The inner core is composed of primarily St_max pebbles gradually decreasing toward St_min toward the core surface. Top right panel: ditto for 10 km. Bottom left panel: increasingly more smaller pebbles mix in between the massive inner core for 100 km core radius. Bottom right panel: for R_c = 500 km there is a more diverse mixture of pebble sizes in the core.