They are based on Arne Jacobsen's iconic ABC typeface from 1937, which we have featured in the past on various products, most recently this rather cool desk set.
But we have just spotted another use for the letters, with a set produced for both indoor and outdoor use. The latter means you can use them as door numbers for the exterior of your house – or if your house has a name, you can spell that out too in the stylish typeface.
They're described as being melamine in construction, with every letter and number available. €3 is the price per letter, which isn't a lot if you just need one or two numbers, although there will be some postage from Denmark too.