The neck adjustable harness is made from quick-drying neoprene, with an inner mesh that allows for airflow and breathable comfort. It features comfortably padded chest support, with a large adjustable neck and chest range. This means you can fit your dog’s harness snugly with no gaping. The dual back and front D-ring placements mean you can choose between clipping your lead onto the front or back of your harness. Using the front attachment can help to redirect your dog's attention to you, and can discourage pulling. The front attachment can be a great tool when training your pup to walk on a leash. You can use the back attachment for securing your dog in the car, or for a balanced walk. Size guide: Weights are approximate ONLY and should not be used as an exact Indicator of size EXTRA SMALL (XS) This is a TINY harness. NECK SIZE: 19cm to 24cm CHEST SIZE 30cm to 40cm APPROX. WEIGHT 1.5kg to 3kg (approx. ONLY) Usually paired with a Puppy Collar ----------------------- SMALL (S) - Neck: 23cm-31cm - Chest: 36cm-48cm APPROX. WEIGHT 3kg to 5.5kg (approx. ONLY) Usually paired with an S Collar ----------------------- SMALL/MEDIUM (S/M) NECK SIZE: 26cm to 36cm CHEST SIZE: 44cm to 58cm APPROX. WEIGHT 5.5kg to 8.5kg (approx. ONLY) Usually paired with a Small/Medium Collar ----------------------- Medium (M) NECK SIZE: 37cm to 48cm CHEST SIZE: 51cm to 74cm APPROX. WEIGHT 8.5kg to 12kg (approx. ONLY) Usually paired with a Medium Collar ---------------------- Large (L) NECK SIZE: 42cm-60cm CHEST SIZE: 62cm-97cm APPROX. WEIGHT 12kg to 18kg (approx. ONLY) Usually paired with a Medium Collar Example breeds: Small border collie, tollers, large frenchie Whilst these measurements will fit labradors / amstaffs etc, please consider a H-Harness as these harnesses may not be long enough for larger breeds and are not designed for these dogs. ---------------------- Always allow a 1-2cm difference in sizing. If you don't have a soft tape measure you can use a piece of string or floss to measure your dog's neck and the widest part of their chest. Then measure the string against a ruler or flat tape measure If your dog's head is wider than his or her chest, be sure to measure the circumference of their head.