高さ

1. Origins, structure, and basic meaning

• Structure: 高さ(たかさ) is the noun formed from the adjective 高い plus the degree suffix さ, meaning height or altitude.
• Basic usage: It is used when measuring a shelf or stating how high a tree has grown. Typical patterns are 棚の高さを測る and 同じくらいの高さ.

2. Common pitfalls and similar expressions

• Turn the adjective into a noun
  • 高い states that something is high, while 高さ is the measurable or comparable noun “height.”
• Difference from 高度
  • 高度(こうど) is used for altitude and also technical or abstract high levels, while 高さ is the everyday term for an object's height or a degree.