These quality chrome plated choke chain collars are available in a selection of sizes and weights to suit dogs of all sizes. They are constructed for heavy duty use and are not recommended for tying out. To be used only under proper supervision. SIZES: 2.0mm: 12inch/30.5cm; 14inch/35.5cm; 16inch/40.5cm; 2.5mm: 14inch/35.5cm; 16inch/40.5cm; 18inch/45.5cm; 20inch/51cm; 22inch/56cm 3.0mm: 16inch/40.5cm; 18inch/45.5cm; 20inch/51cm; 22inch/56cm; 24inch/61cm 3.5mm: 16inch/40.5cm; 18inch/45.5cm; 20inch/51cm; 22inch/56cm; 24inch/61cm 4.0mm: 20inch/51cm; 22inch/56cm; 24inch/61cm; 26inch/66cm; 28inch/71cm; 30inch/76cm