Guide to Redbubble image size requirements in 2025

Master Redbubble’s image sizes for standout designs. Learn cover, T-shirt, and product image optimization tips for a winning online store.

Redbubble’s marketplace lets you print your art on everything from T‑shirts and stickers to wall art. But each product has strict image-size rules. Follow them or risk blurry, cropped, or rejected designs.

In this updated 2025 guide, we’ll walk through Redbubble’s latest dimensions and file specs – from your shop’s cover banner to T-shirt graphics – so your designs always look their best.

Read on for the exact pixel sizes, formats, and pro tips to make your Redbubble store shine.

Optimizing Redbubble cover image size

Your Redbubble cover image (profile banner) is like a billboard for your shop – it’s the first thing visitors see. A great cover photo showcases your style and makes a strong first impression.

Redbubble cover image size guidelines

To have your cover image look good on Redbubble, you must follow their image size requirements. Here are a few key design tips to make a quality cover image:

• Recommended size. 2400 x 600 pixels. Your cover picture will be crisp and clear on most devices. An image upscaler can be your perfect solution. The tool will both adjust the size of your cover photo and enhance its quality if needed. The advanced image resizer DupliChecker allows you to convert your cover photo file format into JPG, JPEG or PNG based on your specific needs.
  
• Aspect ratio. With a 4:1 ratio, your image will be displayed properly without cropping or distortion.
  
• File format. Redbubble accepts JPEG, PNG, and GIF formats of cover art. JPEG is a better choice since it can be compressed nicely. You can, however, utilize PNG if you need transparency in your image.

Tips for creating an engaging cover image

Crafting a quality cover photo for your Redbubble profile is more than meeting the technical specifications for image size. These tips will help you make a good impression:

• Emphasize your style. Choose a photo that represents your artwork best or a collage that showcases your variety of designs.

• Use high-quality images. Ensure your cover image is high definition and not pixelated or containing any artifacts. This will provide your profile with a professional appearance.

• Keep it simple. Avoid using too busy or busy images as your cover image. Have a minimalist design that is clear in conveying your brand message.

• Use bold colors and contrasts. Make use of bold colors and contrasts to give your cover image prominence. This will cause your profile to become more visible among the competition and leave a lasting impression for your visitors.

• Add branding elements. Add your logo or any other branding elements that you might have into your cover image. This will help you in creating brand recognition and maintaining uniform visual identity on your store.

• Update your cover image regularly. Post new designs, holiday-themed images, or holiday offers. This will welcome back customers and make individuals interested in your store.

Redbubble T-shirt image size for high-quality prints

The T-shirt section deserves special care because customers will see your design up close on fabric. To avoid pixelation, start with a high-resolution file. Redbubble’s printers use the actual pixel dimensions of your upload (DPI doesn’t affect the final print), so give them as many pixels as you can. In fact, Redbubble’s own designers advise, “make new designs with as many pixels as possible” – even working at 300 DPI as a baseline, then shrink to match requirements. It’s always better to shrink a large design than to enlarge a small one, since upscaling small art will just blur it.

Redbubble T-shirt image size recommendations

To guarantee good-quality prints on Redbubble T-shirts, it’s important to adhere to the platform’s image size specifications:

• Premium T-shirts (unisex). at least 2875×3900 px. This is Redbubble’s recommended minimum for the main print area.
• Men’s graphic T-shirts. Require at least 3873×4814 px. (These have a larger printable area.)
• Maximum size. Redbubble won’t accept files larger than 13500×13500 px (or 300 MB). You don’t usually need anywhere near that huge, but don’t exceed this limit.

Best practices for designing T-shirt images

In addition to following the image size recommendations, consider these best practices when designing T-shirt images for your Redbubble store:

• Create at full size. Don’t rely on Redbubble to enlarge your artwork. Upload files that meet or exceed the recommended pixels. If you must enlarge a smaller design, your art can get blurry, so it’s best to redesign at a larger canvas. (Redbubble itself cautions against upscaling existing art because “it adds new pixels and could degrade the quality”.)
• Use vectors or high-res raster. When possible, draw your art in vector format (Adobe Illustrator, etc.) so it can scale freely. Otherwise, work with very high-res raster art. This way you can tweak size without losing sharpness.
• Mind color and shirt color. Test how your colors print on fabric. Dark colors (e.g. blacks) behave differently from bright screen colors. Experiment with placing your design onto a black and white T-shirt mockup so you can tell whether it stays colorful. Redbubble will copy the same colors you upload (in sRGB), so you may want to design in CMYK initially and then switch to RGB for upload.
• Avoid using small text or details. Small text and very detailed details may not copy well when the design is small on a T-shirt printing. If you want a small motif (like a chest logo), make sure it’s still legible in Redbubble’s preview. Sometimes simpler is better on fabric.
• Experiment with placement. Not all designs need to span the full print area. For example, a small “pocket” print at the chest or a design placed near the top can look very appealing. Try shifting your design in the Redbubble uploader to see what layout works best for your art.
• Preview by style. Redbubble’s preview option enables you to see your artwork on multiple T-shirt styles and colors. Check how your design will print on women’s and men’s cuts.

Pro Tip: the women’s premium tee has a scoop neck, so the print will be higher than on the men’s tee. If needed, nudge the vertical placement so your design prints dead center on each shirt style.

By utilizing Redbubble’s suggested image size for T-shirts and incorporating these design best practices, you can create gorgeous, high-quality printed T-shirts that satisfy your clients and add luster to your store.

Determining the best image size for Redbubble products

Overview of image size requirements for various Redbubble products

As one of the most popular print-on-demand companies, Redbubble offers a range of items from T-shirts to stickers, phone cases, wall decor, and more. With each product, there are some specific image dimensions necessary for optimal-quality prints. Below is a list of those recommended image sizes for some of the most popular Redbubble products:

• Stickers. Up to 2800×2800 px (extra-large sticker). We recommend uploading at this max size so your art is available on all sticker sizes. (Sticker files must be PNG to preserve transparent edges.)
• Phone cases. About 1187×1852 px for standard phone cases (MagSafe cases use 1332×2051 px). This covers the full print area on most models.
• Art prints / Wall art. 3840×3840 px. This square canvas covers all art-print sizes up to extra-large. Smaller uploads will simply be centered with white borders, so stick to at least 3840 px for a full-coverage print.
• Throw pillows (all sizes). 3225×3225 px. Square images work best since pillows are square prints.
• Tote bags (standard cotton). 2400×3200 px. This is the minimum for the full-color tote bag printable area.
• Posters. Starts around 4100×5840 px for a small poster, up to 8310×11790 px for large posters. (Even “small” posters require roughly 4–5 megapixels.)

Always refer to Redbubble’s official guidelines for each product to ensure that your designs meet the necessary specifications.

Tips for optimizing images for different Redbubble products

Optimizing your images for different Redbubble products is more than simply resizing them to the suggested sizes. The following are some tips on how to make your designs appear their best on different products:

Match orientation to product. Some products have fixed shapes. For example, a square design is ideal for pillows and art prints, while a landscape design suits rectangular posters or tapestries. If your original art isn’t square, consider making portrait/landscape variants so it fills the space (Redbubble even suggests creating variations for portrait, landscape, and square).

Use product templates. Redbubble provides design templates for complex products (duvet covers, all-over print shirts, etc.). These templates (available via Redbubble’s Help Center) show bleed lines and positioning, so you can place your art safely. Using a template helps you avoid surprises like important parts getting cut off or distorted.

Always preview on product. Use Redbubble’s mockup preview to see how your design looks. Check multiple sizes and colors (mockups on a mug, sticker, or shirt) to catch issues before you publish. For instance, a design might look great scaled on a shirt but be too small on a phone case – the preview will show you that.

Ideal resolution. When in doubt, use more resolution. Post at or greater than Redbubble’s recommended dimensions. If your picture is smaller, by all means, recreate it bigger instead of merely enlarging it (which blurs detail). Larger source files give you greater leeway to work with any product’s size.

Color workflow. Redbubble recommends working in a CMYK color mode (for optimum print colors) and then exporting your final piece to sRGB/PNG or sRGB/JPEG for upload. This ensures color consistency from your on-screen file to the printed product. Also, keep in mind that prints will look somewhat different from on-screen; if possible, have a sample order or use Redbubble’s digital proofs on designs that are color-critical.

Verify official sources. Finally, save Redbubble’s Dimensions & Format guide. It is regularly updated and includes all the current pixel dimensions for every product. You can also see size guides within the upload tool for each item. Always employ these official specs while creating new products so your pictures will be printed flawlessly.

If your images aren’t of high enough resolution, use Smart Upscaler by Icons8. It resizes images to a higher resolution with more detail and less noise. It’s a decent means of raising photos that fail Redbubble requirements.

Redbubble’s success is not merely a function of creative talent—it’s discovering the technical requirements of the site and honing your work accordingly. Every specification we’ve touched on has been put there for a reason: to make your designs look professional and convert browsers into buyers. Start with your cover image and work systemically through your line of products. Reference each design against the size specs, cross-check them against different types of products, and be prepared to re-load improved versions of your current designs.

Check out our image size guides for eBay, Etsy, and Shopify.

About the author
Mia Donovan. Marketing designer who weaponizes visuals to make people actually care about products. Archives competitor ads like rare artifacts, has lost friends over kerning disagreements, and analyzes color psychology with criminal profiler intensity.