Verses with the word length in the New Testament (3 verses):

Romans 1:10
Making request, if by any means now at length I might have a prosperous journey by the will of God to come unto you.

Ephesians 3:18
May be able to comprehend with all saints what is the breadth, and length, and depth, and height;

Revelation 21:16
And the city lieth foursquare, and the length is as large as the breadth: and he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the height of it are equal.