This project illustrates creating a large bangle. The prototype just turned out that size. You can scale the PDF of the slide rule graphic to be smaller if you want a thinner bangle or sized for a man's bracelet.
To make this papercraft, you will only need to print out the slide rule template on cardstock and glue up the parts.
So at the office or home, have ready:
printer to print PDF file
several sheets of cardstock, thin cardboard
straight paper trimmer
Download the PDF to make a papercraft slide rule from the Slide Rule Museum site
Look for the "Scales to make a Mannheim Slide Rule - K,A,B,L,C,D - Kinsman" and click on the image to access the PDF in your browser.
Print out on regular letter size paper. The graphic will also be our guide to construct the bangle.