XS: Bust 26cm-32cm length 110cm width 1.0cm (traction for 4 pounds following the dog)S: Bust 32cm-45cm length 110cm width 1.0cm (traction for 4-8 kg dog)Commodity advantage:With imported high quality PVC and nylon production and in pull straps suit、 reliable quality、 guarantee the parents in the use of safety2. H style chest straps dressed up very convenient、 such models can make the force evenly、 parents in pulling the dog、 not only easy to control will not hurt the baby3 chest strap adopts grid design、 breathable performance is quite good、 especially suitable for use in the summer hotPVC material is waterproof、 so the cleaning is very easy、 and will soon be able to dry.