Clothing store

I just started a retail business in the Sims 4. I want to sell clothes there. I can't put any clothes on those shelves and displayers made especially for retails (I have the dutch version and I don't know the English word, sorry) in the trailer you can see clothes displayed on these displayers, but in the game I can only put clothes on mannequins. Does anyone know how i can place clothes on something else than my mannequins? Thanks.