From memory, they’re either 6 or 8mm, but might be different if one door’s been changed (mine were). Best to measure.
Anyway I hope the window winder mech and innards Are all good Because you will have to unclip the cards again without breaking the clips away from holes on the door cards And then reaching up inside the door and try to locate everything into place Without sawing into your forearm on the rough Metal of the door not forgetting you will have to take all the membrane off again
Just flattening out the door cards where the damp got to them, used PVA, as suggested, big weights holding them flat while they dry. New door speakers on their way. New membranes already here