Detailed guide
Need the assumptions, examples, and troubleshooting?
The calculator stays focused here. The supporting reference has moved to its own page.
Read the Back of Shirt Decal Size guideSizing calculator
Use this back decal sizing tool when the design sits on the full back, upper back yoke, or across the shoulders instead of the front chest.
Use this as a planning guide, then measure the actual blank before pressing or printing.
Use this back print chart as a practical starting point. Measure the actual shirt or hoodie before production, and remember that 2XL-5XL back designs should not scale linearly beyond press and transfer limits.
| Shirt size | Full back decal | Upper back / yoke | Across shoulders | Production note |
|---|---|---|---|---|
| Toddler | 5.5-7 in wide | 4-5 in wide | 4.5-5.5 in wide | Keep artwork simple and high enough |
| Youth S | 7-8 in wide | 5.5-6.5 in wide | 6-7 in wide | Reduce tall designs first |
| Youth M | 8-9 in wide | 6-7 in wide | 7-8 in wide | Check shoulder width before pressing |
| Youth L | 8.5-9.5 in wide | 6.5-7.5 in wide | 7.5-8.5 in wide | Scale from actual garment width |
| Adult XS | 8.5-9 in wide | 7-8 in wide | 8-9 in wide | Measure narrow adult cuts |
| Adult S | 9.5-10.5 in wide | 8-9 in wide | 8.5-9.5 in wide | Keep below collar line |
| Adult M | 10.5-11.5 in wide | 8.5-9.5 in wide | 9.5-10.5 in wide | Use paper placement first |
| Adult L | 11-12 in wide | 9-10 in wide | 10-11 in wide | Check side seam clearance |
| Adult XL | 11.5-12.5 in wide | 9.5-10.5 in wide | 10.5-11.5 in wide | Do not crowd shoulder seams |
| Adult 2XL | 12-13 in wide | 10-11 in wide | 11-12 in wide | Do not scale past press or sheet limits |
| Adult 3XL | 12.5-13.5 in wide | 10.5-11.5 in wide | 11.5-12.5 in wide | Measure before production |
| Adult 4XL | 13-14 in wide | 11-12 in wide | 12-13 in wide | 14 in is a practical max for many setups |
| Adult 5XL | 13-14 in wide | 11-12 in wide | 12-13 in wide | Keep artwork balanced, not oversized |
| Hoodie back print | 10-12 in wide | 8-10 in wide | 9-11 in wide | Drop lower for hood clearance |
Detailed guide
The calculator stays focused here. The supporting reference has moved to its own page.
Read the Back of Shirt Decal Size guide