Bags are slightly larger than the original, but fit well. But you have to watch out that they (shorter side down) inserts the correct direction, otherwise you have to Schodder in sucker and not in the bag. Can one with the original bag but also happen. The cause lies in the vacuum cleaner itself, because the stub which füher, simply is too short in the bag and therefore manschmal not sure is in the bag. As I said, the same problem have the original bag, why not since Siemens nachbessert the sucker, is beyond me.