Sanni Kruger (X) (asker) Feb 9, 2019:

More context Apologies to all who answered. I should not have agreed with Cillie Swart because I did not read the answer properly. I do not think it has to do with the shape. Here is a bit more context: "Die neue Serie XXX trifft den anhaltenden Trend zu Harmonie und weichen Formen. Die asymmetrische Serie zeichnet sich durch weich schwingende Linien aus. Der kurze, moderne Artikelrahmen trifft die Bedürfnisse einer jungen Zielgruppe."
Although range or series may be the best solution in this particular context, I am not sure if it would work in another. that's why I initially closed the question without grading.

Lancashireman Feb 4, 2019:

"Has anyone come across this term before?" See the Villeroy-Boch link below.

Lancashireman Feb 4, 2019:

Re "the number of pieces in a set" Cillie Swart: "it has to do with the shape"
My answer: "restricted range"
There seems to be a contradiction here.

Sanni Kruger (X) (asker) Feb 4, 2019:

Suggestion from other forum Thank you all for your input.
I am actually with Cillie on this one. I did initially think of "range" too. But I now think it has more to do with the numbr of pieces in a set. Just need to come up with something snappy.