Unlock New Opportunities: How to Size a Market Without a McKinsey Budget

Most small manufacturers know that feeling: you hear a buzz about a new product idea, a growing niche, or a potential customer, and your gut screams, “This could actually work!”

But then comes the tougher question: Is there really a market for this?

Look, you’re not about to hire McKinsey or drop fifty grand on consultants. Yet, you still need to make smart, informed decisions. The good news? You can get 80% of the insight with 0% of the consulting bill—if you know where to look and what to ask.

Step 1: Figure Out What You’re Actually Trying to Learn

Before you even open a spreadsheet or Google anything, take a few minutes to write down exactly what you want to know:

• Who buys this kind of product or service?
• How many of them are out there?
• What’s driving their demand?
• What would they stop buying from you?
• Who’s already selling it?

Too many businesses jump straight to assumptions. Start by getting crystal clear on the unknowns. That’s what market sizing is truly about—cutting down on uncertainty before you waste time or money chasing the wrong opportunity.

Step 2: Master Public Data (It’s Free!)

There’s more free information available than most people realize. Here’s where to dig:

• U.S. Census Bureau & NAICS Codes: These are goldmines for understanding industry sizes, the number of businesses in specific sectors, and where they’re located.
• IBISWorld (via Your Library): Many local public or university libraries offer free access to expensive industry reports. It’s worth a quick call or visit to see if yours does.
• Trade Associations: Groups like the National Association of Manufacturers (NAM) or specific industry associations often publish market data and forecasts. If your customers are hospitals, food processors, or machine builders, there’s likely an association for them with valuable info.
• Thomasnet & D&B Hoover’s: Use these platforms to get a sense of how many suppliers and buyers exist in a target category.

You just have to be willing to dig a bit.

Step 3: Pick Up the Phone

There’s absolutely no substitute for getting direct information. Call 5-10 people who are actually in the space—buyers, distributors, even friendly competitors. Remember, you’re not selling; you’re learning.

Ask them things like:

• What trends are they seeing right now?
• What’s frustrating them?
• Are they sourcing domestically or overseas?
• If you offered X, would they actually try it?

You’d be surprised how many people are willing to talk, especially if you approach them as a peer, not a salesperson.

Step 4: Use AI for Your First Drafts

Tools like ChatGPT can be incredibly helpful for brainstorming:

• Potential customer segments
• Common pain points
• Keyword trends
• Sample buyer personas

Just remember, don’t treat its output as gospel. Use it to get your ideas flowing, not to make your final decisions.

Step 5: Put Some Numbers to It

Keep it simple to start:

• Total potential customers × estimated annual spend = Market Size
• Market size × your realistic capture rate (aim for 1–5%) = Your Opportunity

Then ask yourself: Does that number truly justify the investment of your time and resources? Or are you chasing pennies when you could be aiming for dollars?

Final Thought

Market sizing doesn’t need to be perfect. It just needs to be directionally right. It needs to give you enough confidence to know whether to dive deeper—or to wisely walk away.

You don’t need a fancy McKinsey presentation. What you need is a solid process and the willingness to ask smart questions before you make big moves. That’s how you make decisions with confidence—and without regret.

To learn more please reach out to lmusante@catalystconnection.org. Also, visit our website for more information about Catalyst Connection and our trainings/events.