Originally Posted by Randaddy
This is really bad advice. The only way to enlarge gaskets is to stretch them. Even cautious trimming can cause tearing and you're replacing gaskets before you know it...
"Neck gaskets are designed to be trimmed to fit." (not the Kokatat wrist gaskets though).
Kokatat | FAQs
You can certainly try stretching the gaskets, but they don't stretch much, in my experience. The reason gaskets have rings is for trimming. Sure, its better not to, but if the gasket is too small, and stretching efforts don't do enough after a week or two, there are not many options, if the neck gasket is choking you, or the wrist gaskets are making your hands fall asleep: sell the drysuit, or leave it in the closet; or trim the gaskets. Here is a video on trimming gaskets: