XS - Extra Small - for dogs 1 -10 lbs.
S - Small - for dogs 9 - 25 lbs.
M - Medium - for dogs 20 - 60 lbs.
L - Large - for dogs 50 - 90 lbs.
XL - Extra Large - for dogs 90+ lbs.

Don't Forget Your Doggles Lens Cleaner

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