These boards are far more variable in size and shape. Some have one or two waney (natural) edges. Boards are typically rectangular with striking black lines from the spalting. Approximate sizes would be 35 cms by 25 cms and all are 3 cms thick.
Spalted Ash chopping board
Every board will be slightly different, even if cut from the same piece of timber. Boards are dried, cut, sanded smooth, and protected by typically 4 coats of Danish oil which is food friendly. All boards are locally sourced hardwood, and suitable for use as chopping, cutting or serving boards. If a board starts to look dry after a few months I would very lightly sand and re-oil. Boards should be wiped clean with a damp cloth, and not soaked in water or put through a dishwasher!