How Many Criminal Defense Mailers Should an Attorney Send?

The right number of mailers depends on three things specific to your firm: how many new clients you can actually take on, how large the pool of matching cases is in the counties and categories you're targeting, and what you're willing to spend to fill that capacity.

There's no single right number in a month, and any answer that gives you one without asking about your practice first is guessing. Work backward from those three things, in that order, rather than picking a volume that sounds ambitious and hoping it fits. The direct mail guide for criminal defense attorneys covers the rest of the campaign.

Why start with capacity, not enthusiasm?

The most common mistake is sizing a campaign around budget or ambition rather than around how many new clients the firm can actually handle well. A solo practitioner who can realistically take on, say, four to six new criminal cases a month doesn't need a volume built for twenty — extra volume past that point just means calls that go unanswered, consultations that get rushed, or leads that sit while you catch up on casework already on your desk. Direct mail: the numbers walks through the response-rate math that lets you translate a mailer count into an expected number of calls and signed clients; run your own capacity backward through that same math to find the volume that matches it, rather than starting from volume and hoping capacity keeps up.

How big is the pool of matching cases?

Once you know roughly how many mailers would fill your capacity, check whether your target counties and categories actually produce that many matching cases. A narrow filter — one county, one case category — may only produce a handful of new filings a week, which caps your realistic volume regardless of budget. Widening to a category with more filing volume, or adding a second county, is how you scale up without loosening your targeting; sending more mail to a pool that doesn't grow just means mailing the same small set of people more than once, which doesn't multiply your results. How many leads a criminal defense lawyer needs per month is a useful cross-check on the number you land on.

How does filtering control volume?

The lever that actually controls how much mail goes out isn't a volume setting — it's which counties and categories you're subscribed to. Narrowing to fewer categories or counties reduces volume; adding more increases it. That's a more precise way to manage volume than mailing broadly and hoping the response rate sorts itself out, because it also controls relevance — a tightly filtered batch is mail sent only to people who actually match what you handle, which tends to perform better than a wider batch padded out with marginal matches just to hit a number.

What is a good size for a first test?

For a first test, aim for about 1,000 pieces in a month. A smaller batch is too easily swung by a few calls either way, which is the law of large numbers working against you. At 1,000 pieces you will usually have a good idea of your response and close rates after the first month, and three months at 1,000 a month gives you a solid number to plan around. If your filters match fewer than 1,000 cases a month, widen a county or a category until they do, or run the test for more months.

Where does budget come in?

Once capacity and pool size point to a volume, budget determines whether you can actually afford to run it — and if not, whether to narrow the filter further or accept a lower fill rate for now. Running the numbers in this order (capacity, then pool, then budget) tends to produce a volume that's sustainable rather than one that looks good on a spreadsheet for a month and then gets cut when the invoice comes due. Timing matters alongside volume, as covered in how soon after charges are filed a mailer should be sent.

When should you revisit the number?

Capacity changes as you hire or as caseload shifts, and pool size can shift with the season or with changes in a county's filing volume. Treat the volume as a number to revisit quarterly, not a setting you pick once, using how to measure the results of direct mail to see what each batch actually produced. See current per-county, per-category pricing and volume to see what a given filter combination actually produces before committing to it.