Photo Collage Sizes: Pixel Dimensions, Ratios and Print
Photo collage dimensions depend on both the canvas ratio and export size. A square High export is 2400 by 2400 pixels; a 4:5 portrait is 1920 by 2400. Choose the shape for your destination, then check the pixel dimensions before downloading.
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The best collage size depends entirely on where it will live. This guide maps the most useful aspect ratios to each social platform, to screens and to common print orientations, so you can choose the correct canvas before you start arranging photos.
Why the canvas ratio matters
Aspect ratio is the single most important sizing decision. Pick it before you arrange anything, because a collage built for a square will crop awkwardly if you later force it into a tall story frame. Decide the destination first and build to fit.
The good news: a handful of ratios cover almost every use, and any layout in a good collage maker can be paired with any of them.
Print sizes and resolution
For print, work to standard paper. Much of the world uses the A-series (A4, A3); North America uses Letter (8.5×11). Choose portrait or landscape to match your composition, and leave a small margin if your printer trims the edges.
Shape is only half the story — resolution is the other half. Start from high-resolution source photos and export at a large output size, up to 3600 pixels on the long edge, so the print stays crisp. View the export at 100% before printing to confirm faces and fine details hold up.
| Print size | Inches | Pixels at 300 PPI | Ratio |
|---|---|---|---|
| 4 ×6 | 4 ×6 in | 1200 ×1800 | 3:2 |
| 5 ×7 | 5 ×7 in | 1500 ×2100 | 5:7 |
| 8 ×10 | 8 ×10 in | 2400 ×3000 | 4:5 |
| 11 ×14 | 11 ×14 in | 3300 ×4200 | 11:14 |
| 12 ×12 | 12 ×12 in | 3600 ×3600 | 1:1 |
| A4 | 8.27 ×11.69 in | 2480 ×3508 | 1:1.414 |
Photo collage dimensions at High export
High sets the longest edge to 2400 pixels. These are the dimensions this editor produces, not a list of minimum upload requirements. Choose the canvas ratio first and verify the destination's current requirements before posting.
- Square 1:1: 2400 × 2400 pixels for an equal-sided grid.
- Portrait 4:5: 1920 × 2400 pixels for a vertical feed composition.
- Story 9:16: 1350 × 2400 pixels for a tall still image.
- Pinterest-style 2:3: 1600 × 2400 pixels for a vertical Pin.
- Widescreen 16:9: 2400 × 1350 pixels for a landscape composition.
Calculate the pixels you will actually download
The editor offers longest-edge sizes of 1600, 2400 and 3600 pixels. Multiply that edge by the ratio of the shorter side to the longer side to find the other dimension. A 4:5 portrait at Print size is 2880 by 3600 pixels; a 16:9 landscape is 3600 by 2025 pixels.
A destination's recommended dimensions are not necessarily an export preset here. Match the ratio first and compare the downloaded dimensions with the current upload requirements. Use a separate resizer when an exact pixel size is essential.
Translate pixels into a print size
Divide the pixel dimension by the intended pixels per inch. A 3600-pixel edge at 300 pixels per inch is 12 inches, while a 2400-pixel edge is 8 inches. The other dimension follows the aspect ratio. Printer requirements and viewing distance can change the appropriate target.
A4 and US Letter have different proportions. Choosing the correct paper shape before arranging avoids an unexpected crop later. Pixels per inch describe image detail at a physical size; they are not the same as a printer's dots-per-inch setting.
Check the size with a concrete export
Choose a 4:5 portrait and the High export. Its 2400-pixel longest edge produces a 1920 by 2400 image. Compare those dimensions with your destination, then inspect the smallest photo at the intended display size. A correct overall ratio does not guarantee that every individual crop is suitable.
Frequently asked questions
What is the difference between collage size and aspect ratio?
Aspect ratio describes the shape, such as 1:1 or 4:5. Pixel dimensions describe how many pixels the exported image contains, such as 1920 by 2400. Physical print size also depends on pixels per inch: divide each pixel dimension by the intended PPI to calculate inches.
What is the best size for a photo collage?
It depends on the destination: 1:1 or 4:5 for Instagram, 9:16 for stories, 2:3 for Pinterest, 16:9 for widescreen, and A4 or Letter for print.
What resolution should I export for print?
Export as large as your source photos allow — up to 3600 pixels on the long edge — and always start from high-resolution originals for a sharp print.
Is Photo To Collage free to use?
Yes. Photo To Collage is completely free with no subscription, trial limit or hidden export fee. The editor has browser resource limits, and supports up to 20 photos in one collage.
Are my photos uploaded to a server?
No. The editor decodes and renders your photos inside the current browser tab. Image pixels, filenames and EXIF data are never sent to Photo To Collage.
Will my collage have a watermark?
No. Every PNG, JPEG and WebP download is clean, with no Photo To Collage branding placed on the image.
Can I make this collage on my phone?
Yes. The editor is touch-friendly and runs in mobile browsers, so you can add, reorder, crop and export photos on a phone or tablet.
Social and screen sizes
Square and 4:5 are useful starting shapes for feed collages. Story 9:16 provides a vertical composition, Pinterest 2:3 is tall, and Widescreen 16:9 suits a wide thumbnail or screen. These are composition options, not guarantees about every platform's display crop.
The table shows this editor's High exports. It does not prescribe platform upload limits or exact destination sizes. Check current upload requirements and the posting preview; use another image editor if you need exact custom dimensions.