Craftsmanship: Yoma 72b
Height of the Ark: Shabbat 92a; Succah 4b, 5a-b
Size of the cover [Kapporet] of the Ark: Shabbat 92a; Succah 4b, 5a-b
The Rim [Zer] around it: Yoma 72b
The Curtain atop the Ark draped over the side somewhat: Succah 7b
The measure of the Holy of Holies, somehow, didn't include the space taken up by the Ark: Megillah 10b
