Update V2 :
Version 2 is now available, with a central reinforcement for more stability, this will answer the
various requests and complaints on this subject

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Simple, sturdy, easy to print, easy to assemble, 4 shelf Display Stand

All 4 shelves are the same size (20 cm x 5 cm)

Size 
Length: 20 cm / 7.8 inches

Width: 20 cm / 7.8 inches

Height: 20 cm / 7.8 inches

Print settings

I used the default 0.20mm Standard profile, nothing fancy, very easy

Here is a 3 shelves version of this model :