Det gik op for mig at her havde jeg min løsning: bh-stropper, der jo er justerbare i længden.

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Den var temmelig stor til mig, så jeg syede den ind i siderne, så den passer mig bedre (ingen billeder).

Den var også meget lang, faktisk for lang til at være skørteforlænger (det er lidt ironisk 😉 ),.
Så jeg kortede den 15 cm af.

Færdig:

 Og action:

Her er den næsten så kort som den kan være. Hvis jeg laver stropperne så lange som muligt, når underkjolen næsten ned til knæene.
Så sidder halsudskæringen så også nede under min bryster, men der sidder den faktisk behageligt, og man kan jo ikke se det, da jeg har tøj på ud over (og det varmer alt sammen).

In English:
I wanted a skirt extender too, like everyone seems to have at the moment. But I wanted it to be adjustable in length.
In my local supermarket I found the solution: A slip with a pretty edge and adjustable bra straps. By lengthening/shortening the straps, I could make the extender fit skirts and dresses of various lengths.
It was a size XXL, so I took it into my size.
It was also rather long, too long to work as skirt extender (that is sort of ironic). So I removed 15 cm (6″) of the length.
Here I show it being almost as short as it can be. When the straps are extended in their full length, the neckline is below my bust. But it is comfortable and my clothes cover that.