in Ordnung — in order. The everyday word for acceptable, fine, all right.
Das passt. — That fits. It means that something is right.
haargenau — exact to the hair.
auf den Millimeter genau — exact to the millimeter.
mehr schlecht als recht — more badly than rightly. Barely adequate, said with disapproval.
alle fünfe gerade sein lassen — to let all fives be even. To let something slide and not be strict. People say it of an exception they allow.