Do I need separate files for stickers and apparel on TeePublic?

No. TeePublic uses a single transparent master PNG and auto-crops it per product template. You should supply a high-resolution master (4500×5400 px recommended) with a clean alpha. Stickers and small items require higher effective DPI (300) so verify your master’s pixel density at the intended print size with a DPI checker before upload.

What color profile should I use when exporting the master PNG?

Export in sRGB. TeePublic’s previews and print conversions assume sRGB for consistent color between the web preview and the print pipeline. Avoid CMYK exports — those are for print houses and can shift color unpredictably when converted back to sRGB by the platform.

Why was my upload flagged for a non-transparent PNG?

TeePublic needs an alpha channel to derive die-cuts for stickers and to isolate artwork for apparel printing. If your PNG has a flattened white background or no transparency, the system will flag it. Re-export with a proper alpha layer, then re-check at 100% zoom to ensure no white fringe remains on edges.

How do I prevent fine-line details from softening on prints?

Very thin vector strokes can rasterise into semi-transparent pixels when exported at large sizes and later be softened in processing. Slightly increase stroke width (0.5–1 px at final export scale), simplify extremely dense textures, or provide a higher-contrast outline. Test by zooming to 100% at the target export size and viewing the file at the print size to catch softness early.

Can I use JPG for posters and PNG for everything else?

Yes. Posters that don’t need transparency can use high-quality JPGs; keep them at maximum quality. But remember TeePublic uses the same master across many SKUs — if you upload a JPG as your main file you lose the alpha needed for apparel and stickers. For mixed catalogs, supply a PNG master and generate JPG poster exports when you need separate poster files.

What’s the safe area to avoid t-shirt template crop issues?

Keep critical elements well inside the master canvas — roughly a 200–500 px margin on the short edges and 300–600 px on the long edge for a 4500×5400 master. That places important artwork inside a central zone that survives most auto-crops. If you need a printable area reference, export a guide overlay or test uploads and inspect product previews before publishing.

Platform Guide

Print-Ready Images for TeePublic

TeePublic is a display-everywhere apparel marketplace that uses one master PNG across dozens of product types. This page gives a concise, practical upload spec and a step-by-step workflow to prepare a single master for tees, stickers, posters, phone cases and mugs.

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TeePublic is best for designers who want one design to appear cleanly across apparel, merch and wall art without making separate files for each SKU. Because a single transparent PNG is used for everything, you keep one master file that TeePublic auto-crops and maps to each product template.

If you normally prepare files for other platforms, the same master-focused approach applies — see our cross-reference for Printful and the differences for marketplaces like Etsy. Before you upload, run your file through the DPI checker so you don’t hit TeePublic’s automatic 150 DPI reject threshold.

Full upload specs (table)

TeePublic expects a single master PNG that feeds every product template. The table below lists the confirmed 2026 specs for the most common product classes you’ll sell. Treat the 5400px longest edge as the target for high-detail artwork.

Product	Pixel Dimensions	DPI	Format	Notes
Master Upload	4500 × 5400 px	150 min, 300 ideal	PNG (transparent)	Single transparent PNG used across every product class; longest edge 5400 px is the sweet spot.
T-shirt Print Area	Auto-cropped from master	150 min	PNG	TeePublic auto-fits the master to each apparel print zone; avoid extreme aspect ratios.
Sticker	Auto-cropped from master	300	PNG (transparent)	Die-cut comes from the PNG outline; maintain clear alpha edges.
Poster / Wall Art	Auto-cropped from master	150	PNG / JPG	Master used at native size where the canvas allows; supply high-res for larger prints.
Phone Case	Auto-cropped from master	300	PNG	Per-model crop applied automatically by TeePublic; check critical elements near edges.
Mug	Auto-cropped from master	300	PNG	Wrap layout generated from master; avoid tiny fine lines that can soften on ceramic.

If you need a quick comparison to other platforms’ inputs, check our Etsy spec page for differences in file-format recommendations and crop behavior.

Color profile & file-format strategy

TeePublic runs prints from your master PNG and converts internally to device profiles per product. Deliver your file in sRGB; that’s the safest profile for web-to-print marketplaces and matches TeePublic’s online preview most consistently.

File-format strategy in practice:

Export a PNG-24 with a clean alpha channel. PNG preserves transparency for apparel cutouts and sticker die-lines.
Embed or convert to sRGB. Don’t supply CMYK — TeePublic will remap colors; starting in sRGB reduces surprises.
Avoid heavy compression: JPG is acceptable only for posters where transparency isn’t needed; keep poster JPGs at maximum quality.
Keep layers flattened for export; text as pixels avoids font substitution during processing.

If you need to upsample or verify your DPI before exporting, use our how-to convert to 300 DPI guide and confirm the results with the DPI checker. For a general primer on when to use PNG vs JPG, see best image format for Etsy listings — the same rules apply here for transparency and quality.

Most common rejection and quality-flag reasons

TeePublic flags files for a small set of repeatable issues. Knowing these common failure modes saves time and reduces re-uploads.

Below 150 DPI (auto-reject): Any surfaced item that calculates under 150 DPI at the mapped print size can be rejected immediately. Check the pixel dimensions against the target print size and use our DPI checker before upload.
Non-transparent PNG/white background: TeePublic relies on the PNG alpha for apparel and sticker cutouts. A flattened PNG with a white background will trigger a flag or require manual fix.
Bad aspect ratio for apparel templates: Very tall or very wide masters can be auto-cropped on the t-shirt template in ways that clip important elements; keep critical art within a central safe area.
Very dense linework at high pixel counts: Extremely dense thin lines drawn at large pixels (for example vector strokes rasterised at 4500–5400 px) can soften during raster processing. If you see soft edges, simplify or slightly thicken lines before exporting.
Edge artifacts on stickers and die-cuts: Jagged or semi-transparent pixels on the alpha edge will cause poor die-cuts; clean the alpha and add a small anti-aliased border if needed.

If you add bleed for poster variants, follow our bleed guide so your artwork avoids edge trimming and unintended crops.

Workflow: prepare one master for all TeePublic products

A single-master workflow keeps files manageable. Start with a 4500×5400 px canvas at 300 DPI (or export at that resolution), keep the background transparent, and design with safe margins for apparel placement. The longest edge at 5400 px is the sweet spot when you need maximum detail for posters or large prints.

Step-by-step:

Create the master: 4500×5400 px, sRGB, PNG-24, clean alpha. Place critical elements inside a 4000×4600-ish central safe area so auto-cropping won’t clip them.
Check DPI and pixel integrity: Use the DPI checker and, if needed, follow our conversion guide to reach 300 DPI for stickers, cases and mugs.
Run sight tests: Export a temporary JPG preview for mockups, and inspect edges at 100% zoom to catch faint semi-transparent pixels that break die-cuts.
Export the final master: PNG-24 with alpha. Keep an archive copy as a layered PSD or AI file in case you need a quick tweak.
Upload and review previews: TeePublic will auto-crop for tees, posters and cases — check each product preview, reposition if an element is cropped badly, and re-export the master if necessary.

If you sell wall art variants more aggressively, our guidance for wall art sellers shows how to create poster-first masters and then derive apparel-safe crops. For a general multi-platform workflow, compare notes with the Etsy and Printful pages to spot platform-specific crop differences.

Quick export checklist

Before you hit upload, run this short checklist.

Master PNG-24, 4500×5400 px (or 5400 longest edge), sRGB.
Alpha channel clean — no stray semi-transparent pixels.
DPI ≥150 for apparel; 300 DPI for stickers, mugs and cases verified with the DPI checker.
Critical elements inside a central safe area to avoid tee template crops.
Archive layered source file for future edits.

Following this will minimize flags and rejections and keep your listings live without repeated fixes.

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Frequently asked questions

Related tools

Print-Ready Images for Printful →

Compare Printful’s multi-file approach and templates to TeePublic’s single-master workflow.

Print-Ready Images for Etsy →

How Etsy’s listing images and file-format recommendations differ from marketplace POD sites.

How to Convert Image to 300 DPI →

Step-by-step guide to resampling and preserving quality when increasing DPI.

Advice for Wall Art Sellers →

Practical tips when your masters need to serve large-format prints and apparel from the same source.

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