Hi There! It's called Solid Natural Oak available at Lowes (believe it or not it was the LEAST expensive solid wood that they had). I was tired of the trendy dark wood flooring and wanted something light with some character. I hope that helps! - Chinyere

Also..the size is 3 1/4"

Thanks Chinyere! Especially thanks for responding so quickly with detailed info. What a great help that is for me. And I have to say, it's even more helpful that the flooring is something I can realistically purchase. : ]