- $10: RC Pets STEP-IN CIRQUE HARNESS size L, fit my dog at 15-25 lbs - $5: RAIN JACKET, fleece lined, with reflective material on the back and lead clip - Size S, fits 10-20 lbs dog Neck size ~12-15"; chest ~17-20" I have included photo of RCPets sizing chart for the harness, rain jacket fits the same as harness.