Apple's Former Marketing Director Returned his Bent iPad Pro on Monday saying he's unhappy with Apple's Handling of the Matter

The thickness of hair varies from 0.06 to 0.1, so 0.1 is on the thickest side of the spectrum.

I’d need to see how you did the math on a noticing the curvature of the Earth across a football field. I’m curious because I setup guitars all the time and I can easily eyeball a 0.3mm gap and be really close when I confirm it with feeler gauges or a caliper.

Visualizing the thickness of hairs is difficult. Using a high quality caliper that can measure with 0.001mm accuracy, I found that 0.4mm is about the thickness of a standard envelop measured at the corner (so you’re measuring the thickness of the entire envelop including both sides and the flap).

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