[_lbaq]

400 feet = 121.9 meters, 30 feet = 9.1 meters

[sgt]

Feet, not feets.

[inglor_cz]

"Feets" evokes a vision of Gollum, looking at gleaming Starship and hissing "What a sssstrange fisssssh!"

A nice combination of SF and fantasy in one picture :-)

[_lbaq]

Thanks!

[ehnto]

Not foot?

[dempseye]

I never noticed this, but after thinking about it for a few minutes it seems that in standard usage there is a difference between attributive adjectives and predicative adjectives.

As an attributive adjective, "foot" is indeed correct, e.g. "a 130 foot yacht."

As a predicative adjective, "feet" is correct, e.g. "the yacht was 130 feet long."

Occasionally, in certain regional variations, you may hear "foot" used in the second case: "the yacht was 130 foot long."