It'll fit a Toyo (110mm) board+camera (45A*) no problems. Linhof are I think 99mm square but you lose probably 20mm to the front standard that supports the lensboard, so it might not fit on a Linhof-compatible camera.

More important than the lensboard size is the opening in the front standard. That differs from camera-model to camera-model though they might share a common lensboard size.