Short answer: collect one named size for every person using the exact selected garment's body-width and body-length chart. Use this calculator only for an early budget or missing-response scenario, then replace every estimated row before production. Extra inventory should default to zero unless it has a defined recipient, role, resale plan, or reusable purpose.
Calculate your group shirt size breakdown
FREE PLANNING TOOL
Build an early size-planning scenario
This is not a production roster or a population standard. Replace it with named responses and the selected garment's chart.| Size | Illustrative share | Quantity |
|---|---|---|
| Youth S | 0% | 0 |
| Youth M | 0% | 0 |
| Youth L | 0% | 0 |
| Adult S | 10% | 5 |
| Adult M | 25% | 14 |
| Adult L | 30% | 16 |
| Adult XL | 20% | 11 |
| Adult 2XL | 10% | 5 |
| Adult 3XL | 5% | 3 |
Illustrative adult starting pattern · not a substitute for named sizes or the selected garment's measurement chart.
Choose extra inventory by job, not by a universal percentage
Extra shirts are inventory, not automatic insurance. Keep them in a separate row so the organizer can see the added cash and resale risk. Use the zero-extra default when the roster is final and paid; model another scenario only when the extra pieces have a specific job.
- Late registrations or new members: use recent sign-up history and identify the likely role and garment before choosing sizes.
- Event-day sales: use prior size-specific sell-through and only spend what the organization can leave in inventory.
- Replacements: choose an undated, reusable garment and record each spare separately from named orders.
What the illustrative size patterns can and cannot do
There is no universal US size curve for a school, company, sports team, or family. The four calculator patterns are deliberately labeled as early estimates: they help compare a rough garment budget while replies are incomplete, but they do not predict a real group. A tee, hoodie, polo, and performance shirt can also use different measurements for the same letter size.
Before approval, replace the calculator output with one row per person and review the smallest youth and largest adult or extended sizes against the exact product chart. Never convert a non-response into a guessed size without the person's or organizer's explicit decision.
Collecting sizes without chasing people
- Lock the garment first. Share that product's body-width and body-length chart, not a generic S–3XL list.
- Use one shared sheet. Record name, garment, color, chosen size, and payment or approval status.
- Keep non-responses visible. Remind only those people; do not silently assign them a Large or bury them in inventory.
- Review the edges. Confirm the smallest youth and largest adult or extended sizes before the roster locks.
Mixed sizes can share the minimum
Mixed sizes can count toward one coordinated minimum, so do not shrink the size range merely to simplify collection. Standard adult sizes often share a base price, while youth, extended sizes, different garments, and personalization can change the blank or decoration cost. See how to record mixed garments and sizes clearly →
Youth sizes for schools and families
Youth S, M, and L are garment labels—not universal ages. Ask the organizer or parent to compare a current well-fitting shirt with the selected product's width and length measurements. Confirm youth and adult stock on the same blank before the final roster closes. Family reunion shirts → · School spirit wear →
The organizer's one-page checklist
- Exact garment and its measurement chart shared
- One named row per person; non-responses still visible
- Any extra inventory listed separately with a defined use
- Youth and extended-size availability confirmed
- Free mockup approved before anything is printed
