Martial Arts Postcards
That Fill Trial Mats

PostKnock martial arts postcards start at $1.04 per 4x6 postcard on the Free plan and drop to $0.91 on Pro. No setup fees, no minimums, no contracts. Pricing includes printing and USPS First-Class postage.

The two highest-intent windows are 1) the week before school starts (mid-August through early September depending on your district) and 2) the first two weeks of January. Parents are actively shopping kids activities during both. Schools that hit those windows typically see 2–3x the response of off-cycle mailings.

Photo of kids on the mat in your gi, an age range ("Ages 5–12"), a clear simple offer ("2 free classes"), your school name and phone, and a QR code to a trial-class signup. Avoid jargon: "BJJ rolling" and "kihon" don't mean anything to a parent who's never trained.

Most direct-mail list providers (Anchor, address-verification and filter tools) can filter to households with children under 18 by area. PostKnock mails individual addresses from your existing student-family list, a list you buy from one of those providers, or a ZIP-code list bought in the app (Contacts, Find a mailing list; the count is free). You import the CSV and the wizard auto-maps the columns. PostKnock does not offer EDDM-style geo mailing without a list. Every PostKnock postcard goes to an individual contact record (a name where your list has one; bought lists use "Current Resident" when the vendor has no name). That is what lets us respect your do-not-contact list, and hand your front desk a follow-up call. How EDDM compares.

Yes, especially when mailed to the whole family. Inviting siblings, grandparents, and aunts/uncles to belt promotions creates a ceremony moment that quietly enrolls the next student. Schools running quarterly family-day mailings see 15–25% sibling enrollment within 60 days.

About 5 business days after the card is delivered (the default; you can set 1 to 10), the front desk gets a Call Queue to work. Pre-loaded scripts cover the common parent objections: "I'm worried about contact," "My child is too shy," "How long is the trial?" Each call logs an outcome so the next wave knows whether to retire the contact, push the offer, or wait.

Yes. Each program (kids BJJ, adult kickboxing, women's self-defense) can have its own segment, branded postcard, and call script. Most schools run a kids-acquisition mailing twice a year (back-to-school, January) and a separate adults mailing once a year (New Year's resolution window).

Yes. Facebook ad costs for kids activities have climbed 3–4x since 2020 and reach has collapsed. A physical postcard in the right week with a clear kids trial offer cuts through the digital noise. Schools running PostKnock typically book 1.5–3% of mailed households into trial classes during peak windows.