NET

31 Inside the stand was a round opening that was 18 inches deep; it had a support that was 27 inches long. On the edge of the opening were carvings in square frames.

Darby

31 And the mouth of it within the crown and above was a cubit; and its mouth was rounded, [as] the work of the base, a cubit and a half; and also upon its mouth was sculpture; but their panels were square, not round.

KJV

31 And the mouth of it within the chapiter and above [was] a cubit: but the mouth thereof [was] round [after] the work of the base, a cubit and an half: and also upon the mouth of it [were] gravings with their borders, foursquare, not round.