I purchase these 5 skeins of yarn in Germany on a trip.  Tried to teach my granddaughter to knit something, which is why some have been rewound.  She could not manage it, so they are for sale.  Each skein is 50 grams.  The 5 skeins weigh 8.9 ounces on my kitchen scale.  The one that has a label says the "lauflange" is 133, which I believe means it is 133 meters, which would be about 145 yards each.