A person's appearances count for a lot.

plural of wolf in sheep's clothing

(UK, historical) A board of officials responsible for auditing the accounts of the royal household, making royal travel arrangements, and sitting as a court upon offences committed within the verge of the palace. More recently its jurisdiction was limited to alcohol sales and gambling licences, and it was abolished in 2004.

You cannot accurately judge a person solely by appearances.

Alternative form of cut from the same cloth

(idiomatic, of two or more persons or things) Very similar; possessing many of the same fundamental characteristics.

(idiomatic) One's best or most presentable clothes.

(idiomatic) To live within one's means, without spending more than is affordable.

A hyperbolic phrase expressing elation.

present participle of cut one's cloth to suit one's purse