These are the dimensions of the altar by cubits (the cubit being one cubit and a handbreadth): its base shall be one cubit high, a and one cubit wide, with a rim of one span around its edge. This shall be the height of the altar:
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.
(New Revised Standard Bible Version Online)