It has been established by earlier commentators, as well as in Kabbalah and Chasidus, that there are absolutely no restrictions. This is supported by irrefutable evidence from the Talmud, such as the case of the Aron, which simultaneously had no measurements and yet required dimensions of 2.5x1.5x1.5.
https://www.torahrecordings.com/rebbe/igroskodesh/011/012/3742