After you attach all the segments, you can go back and trim the chain on the other end if any are a bit too long.
One or more parts (or tools) used in this project are no longer available, so we've moved the whole project into the "Misc Jewelry Tutorials with Issues" area while we decide what we want to do about it: find a good sub, re-make this project, or retire the tutorial.
Use 4.5mm jump rings to attach the other ends of the chain segments to another 9mm link. Make sure you keep them in order, so the bracelet doesn't get twisted up!
Attach the 9mm links to your toggle clasp using 2 jump rings side by side for extra strength.
If you want to make this bracelet into a necklace, simply cut a piece of chain to hang it from. Cut the chain about a foot long, and attach a second toggle clasp to the ends.
1 spool [use 6.5" or 13"] #40-099-07-6 Antiqued Brass Plated Rollo Chain By The Spool, 4.5mm
1 spool [use 6.5" or 13"] #40-099-14-6 Antiqued Brass Plated Curb Chain By The Spool, 3mm
1 spool [use 6.5"] #40-099-16-6 Antiqued Brass Plated Drawn Flat Cable Chain By The Spool, 2.1mm
1 spool [use 6.5"] #40-099-35-6 Antiqued Brass Plated Textured Flat Long & Short Chain By The Foot, 4.1mm
1 spool [use 6.5"] #40-099-51-6 Antiqued Brass Plated Peanut Chain By The Foot, 2.8mm
Note: Chain by the foot starts with #40-090, and chain by the spool starts with #40-099. All other parts of their item #'s are identical. So for the rollo chain listed above, type #40-090-07-6 into the search box to get chain by the foot instead of chain by the spool.