This is the Vet I take my dogs and puppies to! Dr Scheiber and staff are great!
This is a great web site (and where I get my) Lupine Collars and leashes, tags, tag holders, Flashing Safty light tags, etc.
Here's how we do it:
from 8 wks to approx. 6 months we use Lupine's Combo/Martingale training collar 15-22"
from approx 6 months thru adult we use Lupine's Combo/Martingale training collar 19-27"
We never need more than a 4' leash!
If traveling with your new puppy in a car and it's not in a carrier, I recommend to always make sure puppy is buckled in! I recommend Lupines Roman Harness (I'll get new puppy size posted asap) and a 2' Traffic Lead to buckle your puppy into the car!!!!