Congratulations on your successful chia seed harvest! There's a photo of my sifter in the article. I don't know the gauge, but you can compare the holes to the size of the chia seeds. I'm wondering if you've crushed the debris so it becomes fine like in my photo. If not, I suggest you put your harvest back into a bag and roll/crush it again. The chia seeds will survive the process if you've waited long enough for the seeds (and debris) to dry completely.