What size zip slider for z3 zip in back window

[Duncodin]

Took the window out. Now I can't find the slider thing-um-ee-jig to zip it back in.

Tons of them cheap on amazon.

But what size? Anyone got their's put away safe? Does it have a number on the back?

Thanks.

Edit. Cancel my last, Over.

Don't need size now. I found one that fits.