Height
Length
noun
The kanji and the word are exactly the same. That means they share meanings as well. This word is usually used for clothing height and length.
The reading is different from what you learned with the kanji. Remember the word 竹? It has the same reading as this. Just think of everyone measuring the heights of things with bamboo (たけ) poles with markers on them. Okay, this one is 5 bamboo poles high!
ユニクロで、七分丈のパンツを買いました。
I bought a pair of three-quarter-length pants at UNIQLO.
少し見ないうちに、ずいぶん丈がのびたな！
You've grown a lot taller since I saw you last!
話を変える訳じゃないんだけど、そのスカートはちょっと丈が長過ぎるんじゃないかしら？
Not to change the subject, but isn’t that skirt just a little too long for you?