Chair rail

[PhotoMan]

What is the standard height above the floor? TIA

[Matt]

For midgets?

[Bria]

Based on the height of your ceilings, chairs, and common sense....

I install mine btw 31" and 36"

[Phisherman]

There is no standard. Place the chair rail where the crest rail of the chairs touch the wall.

[Goedjn]

There is no standard. If you're using it to keep chair-backs from banging up your walls, it should be wherever the backs of the chairs hit the walls. If you're using it decoratively, it should be 38.2% of the way up the wall, and if anyone asks why, it's because Y/X=X/(X+Y). If you're a cheap bastard, either the space above or the space below the rail should be exactly 48", so that you can use uncut sheet-goods over it, or under it, with no waste.