These shelves fit the HSW. They are two sizes
200x130 mm
150x80 mm
They fit the baskets I designed here:
https://www.printables.com/model/1025468-honeycomb-basket-2-sizes-hsw
Suggest: No supports, 3 perimeters, 0.25 layer height, 15% Gyroid infill.
Added a second version of the large shelf with more mounting hole options: left edge, right edge, centered.
The author marked this model as their own original creation.