- for all Typomatic stamps from Trodat- text height: 4 mm- 288 charactersThe replacement series for the Typomatic stamps from Trodat have 288 characters. All letters can be found 8x, as well as special characters and umlauts on the plate.So you can exchange any name, company or whatever else you want on the stamp. The letters are attached to the device (grooved plate) using tweezers.