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A comment on Amazon launches same day delivery for Prime customers. Parent comment

Re:Amazon launches same day delivery for Prime customers by grayclhn on Thursday May 28, 2015 @04:51PM (#9621097)
Scan? A picture of my foot next to a ruler, please. Or some other standard-sized reference object, like an electrical outlet.
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Re:Amazon launches same day delivery for Prime customers by groby_b on Thursday May 28, 2015 @06:42PM (#9621652)
Maybe men's shoes are different, but in women's shoes, you want to know the shape of the arch. Trust me, it matters :)
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Re:Amazon launches same day delivery for Prime customers by nitrogen on Thursday May 28, 2015 @06:19PM (#9621552)
A 2D scan, though probably not what the parent comment intended, implies a size via a fixed DPI. A 3D scan, similarly, can measure actual dimensions without requiring a reference object.
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