[header] How to choose the right life jacket for your dog [title] Weigh your dog. [step] All life jackets are designed for specific weight ranges and will only be effective for dogs who fall within those ranges. Be sure you have an accurate weight for your dog before purchasing a jacket. 
[substeps] If you have a dog that you can pick up, you can do this using your home scale. Step on the scale to find your weight, and then step on it holding your dog.