Letterbox

The humble letterbox...

How should it be designed?

Box design

• floor area sufficient to lay a C4 envelope (or Wikipedia:MacBook Air, which is the same size to within 2mm) flat
• 'mouth' sufficient width to eat said C4 envelope. Approx 3cm high.
• entire box should be approx 10cm high to prevent regurgitation theft
• top and sides of mouth should have overhang (lips!) to protect from weather.

Security

• Box should be lockable, and internal mail not be reachable through the mouth or other openings.
• Box should be securely bolted down to prevent theft of entire box

Placement

• Between approx 100 and 150cm from ground level (keyed from height of mouth), and no further than 50cm back from the path (ie, postie reach)