calculated value in Start() function seems to be 0 when trying to use it.

Hi, i'm an amateur trying to learn c#. I'm confronted with a problem I can't seem to solve: I'm trying to use the "objectLength" value in the Start() function of my SpawnManager. I calculate "objectSize" in a different script called objectMovement. Now I know that it calculates the value correctly, but when I try to use it in the Start() function it is 0. (My Debug.Log(objectLength) outputs 0.) It must be a stupid error but I can't solve it. Thanks for your kind help!