How to measure spoke length, for replacement

[Swe]

Hi,

I have a Xofo xfvk 500W (I think copy of Bafang CST 500W), in a 700C wheel. I saw today that one spoke is broken. I thought I could easy find information what spoke to replace with but only find spoke calculations for new builds...

Anyone know where I can buy new spokes in EU pretty quick? Or if it is standard maybe a local shop has it.
I measured 2.6mm width, and 24.2cm length from center of hole in the motor to the inside of the wheel rim. See the red line in the picture. What size is this?

 

[wesnewell]

A 240mm 12g spoke will work fine assuming your measurements are correct. You measure spokes from the inside of the spoke head bend to the end of the threads on the spoke. A 12g spoke has a 2.6mm diameter.