length
It doesn't matter.
They can come in any order.
Either doesn't really matter.
height, depth and width
When measuring a curtain, the length usually comes first. This refers to the vertical measurement from the top to the bottom. The width is then measured horizontally from side to side.
width always comes first
length
There were three curtains in the Tabernacle, and a larger number in the Temple. I'll assume that you're asking about the curtain that was in front of the Holy of Holies.In the Tabernacle, its width was ten amot (about five meters).In the First Temple, its width was that of an ordinary door, since there was a wall with a curtain where a door would have been.In the Second Temple, its width was twenty amot (about ten meters).
it is lxwxh (width x hight)
Any measure that you like. The length does not affect the width.
It doesn't matter.
multiply the wide you want your curtain by the length plus the width of the fabric and you will get the proper yardage for the curtain.
After looking at several sites the rugs were all describe by the shorter(width) first.
You can do it whichever way is more convenient for you. The answer is the same either way.
They can come in any order.
Either doesn't really matter.