Level / degree of something ～さ

Add さ to adjectives to express a degree or amount

Construction:　-i adjectives:
Remove the trailing い and add さ

ぞうさんの高さは何ですか？
zou san no takasa wa nan desu ka?
What is the height of an elephant

NOTE: The さ shows a degree; this can be a higher, lower, wider, thinner, etc amount. (we could be asking the height of an ant)

Construction:　-na adjectives:
Just add the さ without the な

この車の静かさは驚くべきです。
kono kuruma no shizukasa wa odoroku beki desu.
This car's quietness is amazing.

NOTE: The finished product (adjective + さ) becomes a noun phrase and is treated as a noun grammatically.