I've got four boards, just sanded/wetted one for showing off. That one and it's matching pair are the thicker ones, probably around 7mm. Then I have a longer pair that would yield 3 tops, but really they'd be veneers, I am guessing they are around 5mm. It's all guesswork. They're stored under my bed, and all my measuring devices are in the workshop (garage).....so, you know, let's just say they measure between 3 and 10mm. Probably.