There are a few differences between human scissors and dog scissors. The biggest difference is the length of the scissors. For pet grooming you want a longer cutting edge to cover more area faster. The most popular length for pets is an 8 inch shear. You can also get much smaller or even longer to suit the size of the pet being worked on. The other big difference is the weight and hardness of the metal used. Pet grooming requires a very strong metal to handle all kinds of textures of coats. Dog scissors will be heavier than human shears and strong enough to handle each pet's differences.