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Replying to @twilliability

also because Twitter threads are where future-Joey goes to figure out what past-Joey was up to: for a double fold of letter size paper sideways, the front stop (1st fold) is 2⅛" and the back stop (2nd fold) is 4¼". 8½÷4 and 8½÷2, basically measuring how far from the top to fold.

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