Stylish design letterbox Letterman IV with post Letterman IV is an extremely practical letterbox in a purist design, which impresses with its outstanding quality of workmanship and has become a worldwide bestseller. With a length of 32.5 cm and a height of 3.5 cm, the insertion opening is dimensioned so that even C4 envelopes can be inserted without folding. The Letterman IV mailbox complies with the DIN 32617 mailbox standard recommended by the German Post Office and is delivered including posts: 8 x 4 x 144 cm.