וַיַּ֨עַשׂ ל֥וֹ מִסְגֶּ֛רֶת טֹ֖פַח סָבִ֑יב וַיַּ֧עַשׂ זֵר־זָהָ֛ב לְמִסְגַּרְתּ֖וֹ סָבִֽיב׃
And he made unto it a border of a hand-breadth round about, and made a golden crown to the border thereof round about.
Read kabbalistic (mystical) interpretation of Exodus 37:12: and classical mystical sources.