"length" - key terms from Wikipedia

arc length
barrel length
blade length
bond length
chain length
coherence length
constraint length
crack length
debye length
digits in length
effective focal length
equal in length
equal length
feature length
feet in length
five digits in length
focal length
foot length
four digits in length
full length
full length	album
hair length
key length
last length	in inches
length
length	contraction
length	of the hypotenuse
length	scale
length	scales
lens focal length
line length
m in length
minimum message length
overall length
path length
per unit length
planck length
prefix length
rod length
route length
scale length
sides of length
telomere length
total length
tour length
unit of length
units of length
variable length
vowel length
word length