Ash boards are normally rectangular, about 35 cms long and 23 cms wide, and 2.5 cms thick. The grain is often (but not always!) fairly straight and tight.
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!