I bought one of the "big Boards" ready-made.
No holes in it. The covering I purchased for it consisted of a poly-type something that looks like warm and natural (about same thickness and density) for the padding and a cotton duck-type fabric for the cover. It has an elastic cord around the edge.
It was cut skimpy (short - plenty wide) and I need to put it back on the board when it is quite damp after washing it.
I like the removable, washable covers.