Sucks about the reduced foodstamps, Candace. :( But now is a good time to sell your jewelry, what with the Xmas season coming up. :)
I've found that most of the bracelets that sell the fastest for me are in a size of 7.25 to 7.5 inches. It also depends a _lot_ on the size of the beads you're using. I've made some lampwork bracelets that, when laid flat and measured straight out, came to over 8 or even 9 inches. But when I put them on my wrist (size 6.75), they fit perfectly (more like a 7-7.25) because the larger size of the beads makes the interior of the bracelet smaller. So if you're using larger sized beads, I'd recommend making cardboard tubes of various wrist sizes - use your friends wrists as measurements - so you can measure the bracelet on the tube for a standard size before finishing it. Paper towel or toilet paper rolls should be good to make them with.
If you'll be making woven bracelets... will you be attaching metal clasps or will you use buttons with a loop of beads to go over it? The reason I ask is - if you're using metal clasps, you can re-size a bracelet almost immediately if you attach the toggle bar of the clasp as a wirewrap to the end of the bracelet. Most weaves will be strong enough to hold the wirewrapped clasp. If not, just make sure you do many, many passes with the thread through the beads at the end of the bracelet - as many as possible and still be able to get the needle thru (use your pliers to help with that).
All you need is some wire. Place the wire through the woven end of the bracelet and then make a wrapped loop so the wire is now connected to your bracelet by the loop; then, add the toggle bar onto the same piece of wire and start to wirewrap that. As you finish the second wire-wrapped coil which atttaches the toggle bar to the wire, you finish it off by bringing the end of the wire _up and over_ the first coil you made. This gives a double wrap to the coil and provides extra strength. Finishing touch - you could add a few of the same beads used in your bracelet: put them on headpins, then attach them to a ring and attach it to the wire you used to attach the clasp. People _love_ jinglies on their bracelets and it will help camouflage the wire you used in attaching the clasp. :)
The point of this all - you knew I was coming to one, didn't you? ) - is that you would be able to re-size a bracelet almost immediately for a customer. If you have basic wire-wrapping skills, this technique allows you to make all your woven bracelets the exact same length - only the wirewrapped clasps will be longer or shorter. I hope this makes sense! :)
You should also be able to use this technique for a button loop made of seed beads, as long as you use many passes of thread/fireline when you're making the actual button loop. If you need pictures because I didn't write the instructions well enough for you to understand, just let me know and I'll take some tomorrow & email them to you. :)