It is not a perfect solution. On two or three occasions, when pulling up a difficult zipper, the safety pin opened and stabbed me! Since then, I have looked for a better solution and I believe I found it.
I replaced the large safety pin on my zipper helper with a small snap hook (see photo) that was attached to a laser pointer that I use to entertain our cats. It is large enough to handle difficult zippers, but it is small enough to attach through the tiny holes proffered by the teardrop pull tabs used with some zippers. And the snap hook is spring-loaded so it will not open in mid-zip.
Monika Kowalska is a Member of this blog and has a cool website that I happened upon: My Transgender Heroines, which features "1497 stories of famous and well-known and lesser-known transgender women and girls from around the world to show us how to live with dignity in accordance with their own psyche and that it is better to be hated for who you are, than loved for who she is not."
The website is in Polish, but Google translates it easily, so don't let the language barrier prevent you from visiting it.
Actors Alec Mapa, Robert Kaiser, Stephen Spinella, and Chris Logan
femulating in the film Connie and Carla, 2004.