I am new to computers and to this site, that's why I am replying years later to your comment wall.
You would absolutely destroy the "wellies" completely to cut off the tops in my opinion.
The better option is to turn/fold down the tops of "wellies".. I done it along with many other's in my Country and it did the job 100%....
I even know of a few Ladies who got Dunlop Mens or Boys wellies one size bigger and again turned down the tops... & they can act as a "fashion statement" to add to it too.. You don't have to turn down the wellies that much either around 2 - 2 1/4" is
what I only had to do !!!
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