<html><head/><body>According to the Adafruit website:<br>
"Protrudes from edge of Raspberry Pi 3mm with microSD card installed<br>
<br>
Thickness (clearance required from bottom of Raspberry Pi): 5.5mm"<br>
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<a href="http://www.adafruit.com/products/966">http://www.adafruit.com/products/966</a></body></html>