Up to snuff
Definition 1 of 1
Pro Tip 1/3Informal Use
Used in casual settings, the phrase adds a friendly tone to critiques or assessments. 
Your cooking is finally up to snuff—great job!
Pro Tip 2/3Colloquial Origins
Originates from the 19th century, reflecting standards of snuff (powdered tobacco). 
This new snuff is certainly up to snuff; it's just what I expected.
Pro Tip 3/3Subjectivity
The phrase is often subjective, varying according to personal standards or expectations. 
I think this essay is up to snuff, but let’s see what the teacher says.