The exact size
- Pixels
- 4,500 × 5,400
- Aspect ratio
- 5:6
- Megapixels
- 24.3
The standard t-shirt artwork size, 15 × 18 inches at 300 DPI, PNG with transparency.
Crop or upscale first?
What to do with common source sizes so the t-shirt design stays sharp. Upscaling happens before the crop, so the crop has enough pixels to fill the box.
| Your image | What to do | Size before crop |
|---|---|---|
| 640 × 480 | Too small, use a bigger source | n/a |
| 1,280 × 720 | Too small, use a bigger source | n/a |
| 1,920 × 1,080 | Upscale 4×, resize 1.25×, then crop | 9,600 × 5,400 |
| 4,032 × 3,024 | Upscale 2×, then crop | 8,064 × 6,048 |
How to make a Merch by Amazon t-shirt design
- Check your image size. If it is smaller than 4,500 × 5,400 on either side, upscale it first: anything from 2,250 × 2,700 up only needs the free 2×.
- Crop to 5:6 at exactly 4,500 × 5,400 with Make thumbnails, which centre-crops a whole batch in one pass.
- Download as PNG and upload to Merch by Amazon.
Need to enlarge first? Upscale 2× for free.
Other sizes with the same shape
| Asset | Pixels | Ratio |
|---|---|---|
| Instagram portrait post | 1,080 × 1,350 | 4:5 |
Questions
What size is a Merch by Amazon t-shirt design?
4,500 × 5,400 pixels. The standard t-shirt artwork size, 15 × 18 inches at 300 DPI, PNG with transparency.
What aspect ratio is that?
5:6. Crop to this shape before uploading so Merch by Amazon does not crop it for you.
What if my image is smaller than 4,500 × 5,400?
Upscale it first so both sides cover the box, then crop. 2× is free and runs on your device, and is enough for anything at least half the target size.
Which file format should I upload?
PNG, so the transparent background around the design is kept.
Does the crop keep the centre of my image?
Yes. Make thumbnails crops from the centre to the exact box, the same way across a whole batch. Use the crop tool if the subject is off-centre.