Not all brands share the same sizing measurements. Different designers and manufacturers use their own size charts. A size SMALL from one manufacturer might be a size XS from another. Even if you think you know your dog’s size, always measure your pet for chest girth and length and LOOK AT THE SIZE CHART to confirm the size before your purchase. Take each measurement a bit loosely. When taking your pet’s measurements, don’t pull too tightly on the tape measure. Leave a little extra room for your pet to breathe and move freely. Please measure carefully before buying. Choose the larger size. If your measurements are close to the higher end of the range given for a particular size, you may want to choose the larger size.This is also a helpful strategy if your dog has a heavy coat. Read more