Great harness for all size dogs, especially the smaller breeds with sizes as small as XXXS. This is a very light weight and low profile harness. All four straps are adjustable to make for a perfect fit for your dog. The Ruffwear aluminum V-ring leash attachment point is for hooking up your leash and allows for comfortable walks/runs/hikes for you and your pooch. The liner is resistant to debris and you'll find reflective material for low light.
Sizing - measurement is on the biggest part of the rib cage behind the front legs:
XXXS: 9-13 IN (23-33 CM)
XXS 13-17 IN (33-43 CM)
XS: 17-22 IN (43-56 CM)
Small: 22-27 IN ( 56-69 CM)
Medium: 27-32 IN (69-81 CM)
Large/XLarge: 32-42 IN (81-107 CM)