I actually purchased two different sizes of the same style shade. I was extremely pleased with the quality of these shades for the price. The top wood slat is exactly the size stated, but there is some slight overhang of the bamboo slats which require trimming if you have not left any width allowance in your measurement. The trimming is quite simple - I just used a pair of household scizzors and it trimmed right up. I would definity purchase again.