Can I make my own pet charm for my dog collar and save on the expense of buying one?

You need to take a look this online store for getting dog collars.
dog collars Luxury On Leash

There are places that design pet collars and leashes to match. I love the dogma London site that has a massive range of designs that match leash to collar; http://www.dogmalondon.com/custom-dog-leashes.html

It isn't crazy at all. We all want to keep our pets safe and healthy. Take a look at the Amazon site - they have guardian angel dog tags that are not expensive but really sweet.

Take the dog collar off and attach the charm to the collar ring that should be hanging from every collar. Then re-attach it to your dog. That way your dog won't get too stressed while you try and fit it on.

Look at the good-doggie website where they sell alphabet letter charms that are really sweet looking. http://www.good-doggie.com/Letter-Dog-Collar-Charms-18mm-p/ps-blockl18.htm

When I was looking for dog charms I came across this website - doggievogue and found some really cute stuff. Check out this link to a dog bone charm that comes with colored rhinestones. http://www.doggievogue.com/category/collar-charms-dogs/crystal-bone-dog-charm

Try the Funny Fur website. They have some really cute stuff. http://www.funnyfur.com/charmsandpendants.aspx

One of the most important sizing tips is to leave enough space for two fingers to fit between the collar and your dogs' neck.

Bell collars are probably uncomfortable on most dogs becauseof the high pitch sound they can emit. Dogs can hear sounds at very high frequencies that humans cannot hear. So a bell around your dog's collar may be makingan unpleasant noise for him that you aren't even aware of.