Front axel spacers' size needed
 

Hi guys
Can anyone tell the size of the spacers for the front axel and the length of the axel itself?
I’m swapping the front end of my Honda 919. Forks and rim are on their way, purchased over ebay. The problem is I have to pick the front axel and a set of suitable spacers out of a box full of different ones in a local shop.
Please, give me a hint!