*WARNING! WARNING* DANGER WILL ROBINSON!
Yes, there are tools used in this instructible. Yes, there is sharp metal in this in structible. YES, use extreme caution when working with tools or metal of any kind, you CAN injure yourself.
Ok, with THAT out of the way...
Step 1: Measure and Cut Copper Tube
If you don't have a fabric tape measure, you can wrap a piece of string round your wrist, and measure that. This is the length of tube you need to cut for your cuff. Mine was a bit more than 8". A hacksaw works well to cut the tube. If you have a tube cutter, I would recommend that for this step. It makes later steps much easier. I couldn't find a hacksaw or a tube cutter (though I own BOTH) so I used an angle grinder to cut it. The diameter of the tube will determine the width of the cuff. If you look above the vise, there is a LARGE copper cuff from a 2" tube in progress.
Step 2: Cut Tube Open
Step 3: Flatten Tube Into Flat Stock
If the end cut has been spread open wide with the pliers, the tube will flatten easily. Just keep moving up the length of the tube as the part that you are hammering flattens out. Be sure to turn over the sheet as it flattens to get the edges as flat as possible.
Step 4: Trim Sheet Edges to Shape
Step 5: Bend Copper to Shape
Get a large diameter piece of steel or iron tube for your mandrel. Using the soft faced hammer, start to bend the very edge of the bracelet. Use sharp overlapping strikes along the width of the copper to start the copper curving. It will look much smoother when you are completed. Once the copper has a bit of curve, take the metal in hand and manually put a sharper curve in the metal simply by carefully bending it. This is a great deal quicker and much easier. From there put the curved copper (now very MUCH like a cuff) on the mandrel and hammer smooth and symmetrical any parts of the bracelet that look out of place until it all looks right. Or at least, right enough to you.