A good go through of the MoI Documentation is a good tool.

I went through your file and it is as you state. THe buckle is .25 deep with a cutout of .125. The letters are .25 deep with .125 sticking out of the buckle and .125 inside of the buckle.

On the upper right corner if you click on the sizeing text, it opens a dialog that tells you the size and allows you to change it.

Limited info in your post though. If you post more details we can answer with more detail.