Then I found the Wenko 16752100 !!!! Honestly, this thing is perfect !!! It has exactly the right size for small shower stalls. It easily fit 3 or 4 bottles care products purely - and the most important: it keeps perfectly on the wall. For me it depends months already was rock solid and has even moved no piece. I must say that in my bathroom are very smooth, flat tiles. It does not rust and for my taste it is very pretty, as discreetly.
Conclusion: small shower stalls with smooth tiles: absolutely perfect. My recommendation to buy !!!!!