I have a square wooden chopping block. It is about 120mm high and about 300mm square at the top. It's in two sections: a chopping surface and a smaller base about 275mm square base. I like it as I usually find benches too low for comfort. Because the block s narrower narrower at the base, you can slide the edge of a plate underneath for and push food off onto it as you go.
After chopping veges I clean it the block hot soapy water and rinse off with hot water. After chopping animal protein (especially poultry) it also gets a final wipe down with vinegar.
About twice per year I give it a light sand to take out any cut marks.