This listing is: 2.5mm Lowercase Antlia Alphabet Letter Set consisting of Lowercase letters A-Z. This measurement is based on the average size ascender/descender letters. Every letter is not 2.5mm. Please know, based on the actual design of the typeface that the letters i and j are larger measuring approx. 3.5mm. Our Sharper Lines and high rockwell hardness rating make it good for use on stainless steel blanks.