very nice customer service, great Erfingund, you just have to know how it goes ...

So there are so many Zipper, even if you measure it with caliper, it may be tight. For me it was like that.
As I was advised a number. Larger to try and the other can I return without problems.
Often goes just try it! And there it was: the larger runs as easily as the original !! With a coat once just really saved coal.

Thanks for the great invention and the kind advice!