Learn · 3 min read · updated
T-shirt print file size: pixels, DPI and print areas
The one number that decides whether a print comes out sharp is pixels per inch at the size it prints. Here it is for six common blanks.
The short answer
A full front print on most t-shirts is 12 × 16 inches, so the file should be 3,600 × 4,800 pixels at 300 DPI, or at least 1,800 × 2,400 at 150 DPI, which is Printful's floor. A hoodie's front is shorter (12 × 10 inches, above the pouch): 3,600 × 3,000 pixels. Send a PNG with a transparent background in sRGB.
Check your image
Type your image's size in pixels to see how big it prints on each shirt at 300 DPI (sharp) and 150 DPI (Printful's floor).
| Shirt | Print area | At 300 DPI | At 150 DPI | Your image prints |
|---|---|---|---|---|
| Classic tee | 12 × 16 in | 3600 × 4800 px | 1800 × 2400 px | |
| Heavyweight tee | 12 × 16 in | 3600 × 4800 px | 1800 × 2400 px | |
| Ringer tee | 12 × 16 in | 3600 × 4800 px | 1800 × 2400 px | |
| Long sleeve | 12 × 16 in | 3600 × 4800 px | 1800 × 2400 px | |
| Crewneck | 12 × 16 in | 3600 × 4800 px | 1800 × 2400 px | |
| Hoodie | 12 × 10 in | 3600 × 3000 px | 1800 × 1500 px |
The numbers, shirt by shirt
These are the front print areas for direct-to-garment printing on the six blanks our text shirts use. The same numbers are in print-areas.json with every colour and size in stock. They are Printful's standard catalog areas; check the product's File guidelines tab before a big order.
| Shirt | Print area | Pixels at 300 DPI | Pixels at 150 DPI |
|---|---|---|---|
| Classic tee (Bella + Canvas 3001) | 12 × 16 in | 3,600 × 4,800 | 1,800 × 2,400 |
| Heavyweight tee (Comfort Colors 1717) | 12 × 16 in | 3,600 × 4,800 | 1,800 × 2,400 |
| Ringer tee (Next Level 3604) | 12 × 16 in | 3,600 × 4,800 | 1,800 × 2,400 |
| Long sleeve (Bella + Canvas 3501) | 12 × 16 in | 3,600 × 4,800 | 1,800 × 2,400 |
| Crewneck (Gildan 18000) | 12 × 16 in | 3,600 × 4,800 | 1,800 × 2,400 |
| Hoodie (Gildan 18500) | 12 × 10 in | 3,600 × 3,000 | 1,800 × 1,500 |
What DPI actually means here
DPI on a print file is just pixels divided by the inches it prints at. A 1,200 pixel wide image printed 4 inches wide is 300 DPI; the same image stretched to 12 inches is 100 DPI and will look soft. Changing the DPI number in an image editor without adding pixels changes nothing on the shirt.
Printful asks for 150 to 300 DPI at print size and advises against going above 300, which only makes the file bigger. Fabric soaks up fine detail anyway, so 300 is the useful ceiling.
AI images are usually too small
Many image generators still hand you roughly 1,000 to 2,000 pixels on a side, so check what yours gives you. A 1,024 pixel square prints about 3.4 inches wide at 300 DPI, or 6.8 inches at 150. That's a chest logo, not a full front.
To print it bigger, upscale it before you upload (an AI upscaler doing 2× or 4× works far better than plain resizing) and check the edges at 100% zoom afterwards. Our guide to making AI art print ready has the whole checklist.
You don't have to fill the area
The print area is the maximum, not a target. A design 10 inches wide on an adult tee reads as a normal full front; 3 to 4 inches on the left chest reads as a pocket print. Leave transparent space in the file rather than cropping tight, and the printer places it where the file says.
Text is the exception that never gets soft: set as vector type and rendered at 300 DPI, as the text shirts on Shirt Says are, a word is sharp at any size the area allows.
Questions people ask
What size should a t-shirt design be in pixels?
3,600 × 4,800 pixels for a full 12 × 16 inch front at 300 DPI. 1,800 × 2,400 is the minimum at 150 DPI. Smaller designs need proportionally fewer pixels: 300 per inch of print.
Is 150 DPI good enough for a shirt?
For most designs, yes. It's Printful's stated minimum, and fabric hides some detail. Fine lines, small text and photos look noticeably better at 300.
Should the print file be PNG or JPG?
PNG with a transparent background. A JPG can't be transparent, so its background prints as a visible box.
Sources
- Printful: Create the perfect DTG file
- Printful: Everything you need to know to prepare the perfect print file
- Printful API catalog (print areas per product)
Checked 2026-10-24. Policies and rules change; follow the source before you rely on a detail. This is general information, not legal advice.
