12x20 F&S Lensboard size?

Anyone know the lensboard size for a 12x20 Folmer & Schwing camera? I am taking a look at one tomorrow in hopes of eventually buying it and would like to mount my 355mm G Claron on a lensboard to take a look at the image on the GG. I have a 7x17 F&S and hope the 12x20 takes the same size... but it looks as though its a bigger lens board from the photos Ive seen.
Did a search on here and through google and didnt find much.

Thanks in advance.

Ill be answering my own question thread.
Jim Galli replied to an email inquiry about this so I figured I would post it in case someone in the future does a similiar search on what these lensboards are sized at.

3/8" thick. with an outside dimension of 161mmx161mm and inside lip sized at 143mmx143mm

scootermm said:

...I figured I would post it in case someone in the future does a similiar search on what these lensboards are sized at.

Click to expand...

While searching, I always appreciate 'think-ahead' folks like you.

In that vein, here're the dimensions for Korona 12x20 lensboards: also 3/8 inch thick, but 139mm square (5 1/2 inches), with the inner lip 128mm square (5 inches).