Other criteria to consider when choosing dog clippers is their type of blades. The choice you will be making is influenced by how much will you cut from your dog’s fur. If you want to shorten it a little, you can go for a #0, #1 or #2 blade. These will offer you all the help you need to groom your dog while keeping their hair long. For a shorter haircut you will need #3, #4 or #5 blade or even higher.