I love this, but I thought that the sprinkles need to be the same length in order for the calculation to work? Looking at the image in the article, the length

I love this, but I thought that the sprinkles need to be the same length in order for the calculation to work? Looking at the image in the article, the length of the sprinkles seem to vary with some being just dots and the others are of a similar length. I wonder if it would work if you discounted those smaller dot sprinkles?