McKenzie Mitts - Key Dimensions?

Hi everybody,
what are the dimensions of the keys to the McKenzie Mitts? Does anyone have an original key? What does it look like?
Thank you in advance!

N.

Here's a pic from John Bushey's publication on the Mitts. I have always believed this was an original key, but I don't know for sure. I no longer have either of my Mitts but the key and lock were very basic. If it fits in and turns, pressing on the spring, it works.

Hi Nils,
this is a picture with measurements from the key that came with my McKenzie Mitts. This kind of key is shown on most McKenzie Mitts with key pictures I have seen, so far.

Best regards
Björn

When I bought a lot of Escape artists and handcuff collector Timo Tuomivaara´s keys, there was also this key in small envelope, marked McKenzie-Mitts on it.
The flag/leaf looks slightly bigger than Your pic Björn.

Thanks Björn, Just what it needed. Thanks for understanding what is required when asking for details. You have covered all the important parts. 

Thanks a lot, guys! Fantastic information! Just what we needed!