market-sizing

Estimate TAM, SAM, and SOM for a product concept using top-down and bottom-up methods.

Updated Apr 8, 2026

Search Tags:#market sizing #sam #bottom-up #top-down #som #tam #growth projection

Ready to run

npx skills add https://github.com/martiraste-lgtm/claude-skills --skill market-sizing-martiraste-lgtm

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: market-sizing
Source: https://github.com/martiraste-lgtm/claude-skills/tree/main/pm-market-research-market-sizing
Command: npx skills add https://github.com/martiraste-lgtm/claude-skills --skill market-sizing-martiraste-lgtm

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Market sizing is critical for strategic decisions but difficult to do rigorously without a structured framework. This skill provides a disciplined approach to estimate TAM, SAM, and SOM using both top-down and bottom-up methods, enabling faster, more reliable opportunities assessments.

Core Features & Use Cases

Top-Down TAM/SAM/SOM estimation to quickly size markets and identify opportunity scales.
Bottom-Up validation using unit economics and expected adoption to cross-check top-down results.
Growth projection and assumption mapping to surface risks and sensitivity analyses for investor pitches.
Use Case: When evaluating a new market entry, you can produce a defensible market size pathway and accompanying growth trajectory.

Quick Start

Provide the market domain, geography, and constraints and I will generate TAM, SAM, and SOM estimates.

Frequently Asked Questions about market-sizing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I calculate TAM, SAM, and SOM for a new product launch?▼

Estimate TAM, SAM, and SOM by providing your market domain, geography, and customer constraints, then reconcile top-down data sources with bottom-up unit economics and explicit assumptions to produce a defensible market size pathway.

What is the difference between top-down and bottom-up market sizing?▼

Top-down market sizing estimates total addressable markets from broad industry data, while bottom-up sizing validates these estimates using unit economics and expected adoption rates to cross-check results and reconcile TAM with SOM.

How do I build a market growth projection for an investor pitch?▼

Build a market growth projection for an investor pitch by mapping explicit assumptions to your TAM, SAM, and SOM estimates, which surfaces risks and enables sensitivity analyses for a defensible growth trajectory.

Can I use bottom-up unit economics to validate top-down market sizing?▼

Yes, you can use bottom-up unit economics to validate top-down market sizing by cross-checking the top-down results against expected adoption rates and explicit assumptions to ensure your TAM and SAM reconcile with your SOM.

What inputs do I need to estimate market size for market entry planning?▼

To estimate market size for market entry planning, you need clear inputs including the target geography, specific industry, customer type, top-down data sources, bottom-up unit economics, and explicit assumptions to project growth.