At about nineteen-thousand meters, the air is so thin and the amount of oxygen so small that a person needs a lot of special equipment to survive.

VOA: special.2011.04.06

The layers are very thin-usually one-fifth or one-tenth of a millimeter.

VOA: special.2010.10.29

Imperator carrots are thin and about twenty-five centimeters long.

VOA: special.2009.02.24

Pencil-thin models strut down the catwalk sporting the latest in ecochic fashion.

VOA: standard.2010.01.31