You can find many envelope templates, but most of them are pretty much the same. Daniëlle from Winkel van Papier (originally a dutch website, but international instructions can be found here) missed one, so she created one herself! And it's a cutie! This template is a nice object on it's own, but it's also very useful. The tempate is made from multiplex 3mm and finished with hardwaxoil (realized by Wij maken Alles). On the template you can find a sticker (sketched by Daniëlle and turned into a sticker by Babet from Oktoberdots) that explains how it works and can be read in any language. The envelopes are 10 x 10 cm. This is going on my wishlist!