I measured my dogs paws as the sizing charts suggested. The boots arrived and are way too small for my dog. I will give these to a friend and reorder a much larger set.
As for the construction of the boots, They seem to be well made and rugged.
My dog drags her left rear leg so we have to keep it covered to protect the skin. Every walk she would put a hole through the sock. These will last longer. They are great in wet weather, very easy to get on and off.