all wool and a yard wide - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Genuine, not fake; of excellent quality; also, honorable. For example, You can count on Ned—he's all wool and a yard wide. This metaphorical term alludes to a length of highly valued pure-wool cloth that measures exactly a yard (and not an inch less). [Late 1800s]