Collars are everywhere, embellished collars, collar necklaces etc. etc, they are so easy to DIY you just need to first decide on how you want to embellish your collar, if you are looking for a soft feminine look you would probably choose pearls and blingy beads as it is in the tutorial. If your style requires a little bit more of an edge you can go for a studded collar, studs can usually be found in a haberdashery, but if you don't have time to run to the store, just nick your brother's (or your own) old studded belt which he wore during the everlasting skater years.. Another way to go about it is to find decorative corners at the hardware store and turn them into pins.
Or if you just aint the DIY type head down to your nearest store you'll be bound to find an embellished collar! Like this one from Mr Price at a steal for R69.99.
DIY LINK MRP ONLINE STORE