This is the type/style I use for all my guys. Besides Yorkies, I have Chi and Lab. Totally adjustable, and the deep "V" gets the straps down away from their throats. They make this in sizes XXsmall to XXlarge. I've seen this style made by several manufacturers, so, as long as you pick one with a deep "V" where it goes over their heads will work well.
Tip:
Loose over the shoulders, snug around the chest/body, works best
Ref:
Top Paw Dog Harness | Harnesses | PetSmart