<unk> <unk> <unk> <unk> <unk>  Passage: The most common standard dimension and location of filing holes punched in paper is International Standard ISO 838. The most common standard dimension and location of filing holes punched in paper is International Standard ISO 838. 2 holes of 6±0.5 mm diameter are punched into the paper. <unk> <unk> <unk> <unk> <unk> The holes are located symmetrically in relation to the axis of the sheet or document. The holes are located symmetrically in relation to the axis of the sheet or document.  Question: Which standard is most common when filling in holes on paper?
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