Does your dog go through their collars quickly? Dog collars can be expensive to buy & since you have the hardware from all the old collars, why not make one of your own? This instructable will show you how to make an adjustable dog collar.
I have recently started a DIY pet blog called Bloggie Stylish where you can find other tutorials like this one.
You will need some sort or webbing like nylon, cotton or polypropylene, a pair of scissors, a D-ring, slide lock and plastic snap (which you can scavenge off of an old collar, and a sewing machine. The flexible measuring tape is only if you want to measure your dog's neck.