We have two Puppia harnesses both in a size Small and they work great for Kiki. We bought them last year when she was around 5 pounds and now that she is 6.5 lbs. they still fit great. The buckle around the chest is adjustable so it allows for room to grow or over clothing. The neck definitely fits looser but I think this is the proper fit for a Puppia.
Annna
Dog profile for Kiki, a female Yorkshire Terrier