One size fits for dogs over 12 pounds, mini, toys, super small pets
The lens part extends to a maximum of about 17cm. The widest point is about 5cm.
The banding width is about 2cm, and the chin strap is folded up to a maximum of about 19cm and transferred to a minimum of about 9.5cm. The back of the headband is folded up to a maximum length of about 17cm and adjusted to a minimum of about 8.2cm.