We stock concrete stretcher block in 4, 6, 8, and 10 widths. 4 inch (3⅝ by 7⅝ by 15⅝) 6 inch (5⅝ by 7⅝ by 15⅝) 8 inch (7⅝ by 7⅝ by 15⅝) 10 inch (9⅝ by 7⅝ by 15⅝)