Hello, this is a 3.5in Arch cookie cutter. It is labeled as such on the exterior of the cutter so that it may be found amongst the other cookie cutters you may have. Its blade depth is 18mm, the extra blade is 15mm, the sharp blade (tip width) is .4mm, and the handle height is 3.5mm. 

I make a lot of cooke cutters for my wife's custom sugar cookie business, so if y'all have any requests on cutters to make or have any questions please let me know. Im just trying to put these out there so if anyone needs one they are easily accessible.