Two rows of mangas fit one behind the other on our living room IKEA Besta shelf. I printed a raised section so that you can also see the second row.

I tried to find a balance between load-bearing capacity and economical filament (pla) consumption. I also wanted the printing to be easy.

The height of approx. 6.5 cm is  based on a tissue box. The height is 11.5 cm deep and 18.6 cm wide, so that three units are needed for a Besta shelf.

If other books are to be used, it is advisable to test the structural load in terms of weight

I am always open to suggestions for improvement, as this was my first attempt at my own model. 

Variants:

BILLY - Three pieces required for one shelf (250 x 115 x 65 mm)

KALLAX - Two pieces required for one shelf (165 x 115 x 65 mm)

BESTA - Three pieces required for one shelf (186 x 115 x 65 mm)