Small Wall Shelf

Shelf is 8 cm Length χ 10 cm Height χ 5 cm Width . I post 5 different version of this Shelf:
1.Shelf 1 Compartment
2.Shelf 2 Compartments
3.Shelf 2 Compartments +1 Side Pen Hole
4.Shelf 2 Compartments +2 Side Pen Hole
5.Shelf 2 Compartments +2 Side Pen Hole +1 Card Hole
is the best Shelf i ever made is simple and glued everywhere (Wall, Plastic, Iron, Glass, etc.).