How to make a photo collage

The five decisions behind every good collage, and the two bits of geometry that explain why some collages look off.

1. Choose fewer, better photos

The most common mistake is too many photos. Start with every candidate, then cut until each one earns its place: a wide shot for context, a couple of mid shots with people, and close-ups for texture (hands, food, details). Mix these three distances and even a simple grid looks deliberate.

2. Pick the layout for the story

  • One clear hero? Use a featured layout: one frame takes about 62% of the space.
  • Everything equally important? Use an even grid.
  • A sequence? Use a strip or rows, read left to right, top to bottom.

Browse all of them on the templates page.

3. Understand why photos get cropped

Phone photos are usually 4:3 or 3:2; collage frames are often square, tall or thin. When the shapes differ, there are only two honest options: fill the frame and crop the photo, or fit the whole photo and leave empty border. Try every combination:

47% of the photo is cut off (the faded part), but the frame is full edge to edge.

That’s why the editor lets you drag inside a frame: in Fill mode you’re choosing which part gets cut, not whether. It’s also why a landscape photo in a tall 9:16 story frame loses most of its width. If you like learning this way, ahaboo has narrated interactive explainers on how everyday things really work, one “aha” at a time.

4. Spacing and borders

Spacing gives each photo room to breathe, but every pixel of gap is a pixel taken from the photos. This is the calculation the editor makes on every download:

(1080 − 2 × 24 − 2 × 12) ÷ 3 = 336.0 px per photo

Photos fill 93% of the width; the rest is border. There are always one fewer gaps than photos, which is why a grid with a thick border and thin gaps looks “framed”, and equal border and gaps looks like tiles.

Thin gaps (4–12 px at 1080 wide) read as modern and tight. Thick white borders (30+) read as a printed album page. Rounded corners soften a busy set of photos; square corners look crisper for prints.

5. Pick the right size before you start

Common collage sizes
WhereShapePixels
Instagram post (best)4:51080 × 1350
Instagram square1:11080 × 1080
Story / Reel / TikTok cover9:161080 × 1920
Facebook / YouTube / desktop16:91920 × 1080
6×4 inch print3:21800 × 1200 (300 ppi)
8×10 inch print4:52400 × 3000 (300 ppi)
A4 poster1:1.4142480 × 3508 (300 ppi)

Choosing the size first matters because changing it later changes the shape of every frame, and so what gets cropped.

6. Finish and share

Add a short caption if the collage is for an occasion (a name and a date is plenty). Download JPG for social media and PNG if you’ll edit further. Then, if you’re stuck for words, the caption writer on the collage maker suggests five.

Make a collage now

Questions

How many photos should a collage have?

For a phone screen, 4 to 9 photos keeps each one recognisable. For prints, you can go much higher: a 12-photo “year in review” on a 4×6 or a 40-photo heart on a poster.

Why are my photos cropped in the collage?

Because the photo and the frame are different shapes. In Fill mode the photo is scaled until it covers the frame, and the overflow is trimmed. Tap the frame and drag to choose what shows, or switch to “Show whole photo”.

What resolution do I need to print a collage?

Aim for about 300 pixels per inch. A 6×4 inch print needs 1800 × 1200 px; an 8×10 needs 2400 × 3000 px. The Print quality option (3600 px short side) covers up to 12 inches at 300 ppi.

How do I make a collage on my phone?

Open collagegrid.app in your phone’s browser, tap Choose photos and multi-select from your camera roll. The download goes to your Downloads or Files app; on iPhone, tap and hold the downloaded image to save it to Photos.