Oddly, two other PUMA sports pants size S fit perfectly, but with the specified textile sizes had always been more than relative.
The product was manufactured in low-wage country Cambodia and is likely to allow a splendid profit margin even at a cost of "only" 22.46 Euro (15/02/2015).
The build quality is quite well, just very quickly becomes hot in these pants to me. Presumably, the synthetic fiber is to blame.