Precisely; in the smallest detail: job fits her to a tee
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with to a t
to a turn. Perfectly, exactly right, as in The description fitted him to a T, or The roast was done to a turn. The first expression, dating from the late 1600s, may allude to the T-square, used for accurate drawing, but some think it refers to crossing one's T's. The variant alludes to meat being turned on a spit until it is cooked to the proper degree. The variant was first recorded in 1780.