UPDATE: i added the strap stl and there are pictures showing how to install it. I've removed it and put it on a few times now and it seems like as long as your print settings are good it shouldn't tear but don't go yanking on it like a mad-person, ease it through.

I don't know how these are generally measured but the sheers themselves measure 81.3mm from the center of the bolt to the tip of the blade. I've included the images i used for photogrammetry. The blades are 4mm thick each and 8mm thick when they cross over each other(close). The bolt measures 23.8mm tall.

As it is, this fits super snug on them and the small bump I engineered just passed the bolt when the cap is on the sheers does its job of keeping them from slipping off.

Since it wasn't needed now i didn't bother printing the tpu strap that is supposed to wrap around the handle and through the hoop on the side to avoid losing it. However you can obviously make your own loop if you wish.

So that is it. I hope this is useful to you.