I have had difficulty finding accurate, dimensioned sketches for anything in the Arduino world. (And, be careful about using the words “sketch” or “drawing” in that land. When the twenty-somethings who live there begin to comprehend what you’re asking for they are likely to respond with something like, "Oh, you want a picture! Give me a moment to get my phone camera out . . . ".)
You may find some of my old posts helpful:
Arduino Nano PCB Files
Help with importing arduino pro mini . . . .
(Late edit) Here are two more, which include a link to a revealing external page:
Arduino Blank Shield Available?
One aspect of the Footprint Editor is confusing me . . .
Dale