It is to good that there are new makers for stamp templates.
This template has some problems. It has no border transparency. Most of the popular stamp templates of deviantART have the border transparency because that makes stamp making much easier. This is a .png file (that supports the transparency) but the alpha channel is missing. There is also too much white on the right side of the stamp so some people that uses this template may not remember to crop the image and there will be more stamps with a weird shape.
There is many tutorials on Internet how to make transparent images in many different programs. It is not difficult and you can do transparent pictures with many free programs, like Gimp. There is also stamp making tutorials here on deviantART.