A cubit is the distance between the elbow and the index finger or roughly 18 inches. That makes 10 cubits about 15 feet.
Not a disputation, just a comment/question. There are actually 2 different measurements for a "cubit" in history. The common cubit is the average length of the forearm. The Royal Cubit is the 18 inch forearm measurement plus an additional 6 inch handspan. This is referenced in, Eze 43:13 And these are the measures of the altar after the cubits:
The cubit is a cubit and an hand breadth; even the bottom shall be a cubit, and the breadth a cubit, and the border thereof by the edge thereof round about shall be a span: and this shall be the higher place of the altar. If you read this passage completely, you will find that this is talking about the Temple. I am saying only that at one point the Temple used a larger cubit than the common one.
Just make sure that if you reprint it (again), you use a better picture.
Yeah, Cactus should try to use a picture that actually represents what is described in Scripture. A picture where the cherubim are fifteen foot tall and have wing spans that stretch from one wall to the middle of the room. Oh wait, that is exactly what we have now. 
Cactus should try to use a picture that doesn't look exactly like an Assyrian god.
Although, you know what? I just realized something while posting this: The Assyrian god Ninip could actually have been a fallen cherub (perhaps even Lucifer himself) that was idolized and made into a god, in which case illustrations of him might be the most accurate examples we have of what the cherubim really looked like. This is an interesting thought indeed...
Many of the false gods of pagan nations were simple representations of actual beings. I would not doubt that this was the case with the mentioned one here.
I can't find a reference in scripture for the cherubs in the holy of holies ever being worshipped. There are references to other things given by God worshipped as Idols though (see Destruction of Nehushtan). If someone could point out one I will agree that HoH could be an Idol for Redemption sake.
1Sa 4:4 So the people sent to Shiloh, that they might bring from thence the ark of the covenant of the LORD of hosts,
which dwelleth between the cherubims: and the two sons of Eli, Hophni and Phinehas, were there with the ark of the covenant of God.
I found this passage before posting my comments. This is before Solomon's temple is built. It clearly states that the Cherubim were in the Wilderness Tabernacle as well as Solomon's temple.
