Kind of a weird sounding question, and I asked this in another thread but thought it best to start a new one.

What is the standard TRUE size of 10x12" film? I ask because Adox lists it as 9.45x12", with true 10x12" special order.

I'm wanting to build myself a camera and will build around a custom made holder from either Chamonix or Gibellini, but want to check this detail first.

Thanks,

Tim