Half of a half
Dashed line: fold toward you (valley). Dash-dot line: fold away (mountain). The arrow shows which way the paper moves.
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1. Fold the right end over to the left end. Press the fold flat.
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2. Fold the right end over to the left end. Press the fold flat.
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3. Fold the right end over to the left end. Press the fold flat.
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Done. Now you have a strip an eighth as long, eight layers thick.
A traditional model. A strip folded in half and half again — the oldest way to measure a quarter.