Exodus 36:21

Each frame was ten cubits long and a cubit and a half wide.

Note Each frame was approximately 15 feet long and 2.25 feet wide (4.6 meters long and 68.6 centimeters wide).

BSB · Berean Standard Bible
The length of a board was ten cubits, and the breadth of a board one cubit and a half.
KJV · King James Version
Ten cubits was the length of a board, and a cubit and a half the width of each board.
WEB · World English Bible
Ten cubits was the length of a board, and a cubit and a half the breadth of each board.
ASV · American Standard Version