Depending on the wrist size you are designing for, cut seven to eleven pieces of the half hard wire each 2-1/2 inches long for the links. My wrist is 7-1/2" and ten links is perfect for my size, so one or two less links will fit a smaller or more average (6-1/2”) size wrist (once the links and clasp are together you can measure length to check, if necessary).
On each link wire, measure down from each end and mark at 1 inch, leaving a 1/2 inch space in the center. At each mark, bend the wire ends up 90°, forming an open box.
Use a file or emery board to de-burr the wire ends, and round nose pliers to form an open eye at each end of the box. These are now the connection loops.
Pro Tip: As shown in the photo below, for an assembly line style shortcut, my round nose pliers are 1/2 inch across the box joint. I use them to make both bends at the same time and finish up with my flat nose pliers to even up the angles. I then use my flush cutters to clean up the ends in case one side is noticeably longer and so both ends are flush cut.