Definition
Market sizing starting from large industry numbers and narrowing down.
Examples
Top-down sizing referenced industry reports.
Origin
Modern business/startup term; used as practical shorthand in product, growth, and investing.
Use it in Nautis
Track top-down sizing alongside everything else in your startup.
Nautis brings planning, fundraising, finance, and operations into one AI-native workspace — so concepts like top-down sizing stop being spreadsheet trivia and start showing up where decisions get made.