We know that bright sunlight can cause discomfort for our eyes, so most of us wear sunglasses or a hat on sunny days to avoid squinting and eye damage. The same is true for dogs; light sensitivity is especially common in dogs with blue and light-colored eyes and a little shade can go a long way to make them more comfortable outdoors.
|Head Width||2.5 to 3.25 inches||3 to 3.75 inches||3.5 to 4.25 inches||4 to 5 inches||4.5 to 5.75 inches||5.5 to 6.25 inches|
|Neck Size||8 to 10 inches||10 to 12 inches||12 to 15 inches||14 to 16 inches||15 to 18 inches||17 to 21 inches|
|Approx. Weight||about 5 lbs.||7 to 14 lbs.||13 to 25 lbs.||22 to 45 lbs.||40 to 65 lbs.||60 to 100 lbs.|