Instagram Grid Size Guide: Exact Pixels for Every Layout
Updated March 28, 2026
I spent way too long figuring out the right image dimensions for Instagram grids. Most guides give you ballpark numbers. This one gives you exact pixels — because Instagram compression is unforgiving, and a 20-pixel mistake means blurry slices.
The Three Grid Types (and When to Use Each)
1. Profile Grid (3×3)
This is the big one — 9 squares on your profile that form a single image when viewed together.
Source image: 3240 × 3240 px
Each slice: 1080 × 1080 px
Why 3240? Because Instagram's max recommended square upload is 1080px. Multiply by 3 across and 3 down, and you get 3240. Anything smaller and your grid will look soft on retina screens.
Upload format: JPG at 90% quality, or PNG if you need transparency. Files should stay under 5MB per slice.
2. Swipeable Carousel (4:5 Portrait)
Carousel posts where each slide connects to the next like a panoramic story.
Each slide: 1080 × 1350 px
Total height depends on slide count (e.g., 3 slides = source image of 1080 × 4050 px)
The 4:5 ratio is the money shot for Instagram feeds. It occupies more screen real estate than square posts — roughly 25% more vertical space on mobile. That's not nothing when you're competing for attention in a scroll.
3. Wide Panorama Split
For landscape photos or artwork you want to break into swipeable pieces.
Source image: 1080 × N px (where N is a multiple of 1350)
Each slice: 1080 × 1350 px
Works great for cityscapes, digital art, or any wide-format content. The key detail: keep the aspect ratio at exactly 4:5 per slice, or Instagram will add padding that breaks the seamless look.
Quick Reference Table
| Grid Type | Source Size | Slice Size | Slices |
|---|---|---|---|
| 3×3 Profile Grid | 3240×3240 | 1080×1080 | 9 |
| Carousel 2-slide | 1080×2700 | 1080×1350 | 2 |
| Carousel 3-slide | 1080×4050 | 1080×1350 | 3 |
| Carousel 5-slide | 1080×6750 | 1080×1350 | 5 |
| Panorama 2-part | 2160×1350 | 1080×1350 | 2 |
The Upload Order Trap
For profile grids, you must post in reverse order. Bottom-right first, then work your way up and left. If you post top-left first, your grid will look scrambled until you finish all 9 posts. And if someone visits your profile mid-posting, they see a mess.
Most splitter tools (including SplitX) number the slices with upload order baked in. Follow the numbers and you're fine.
What Happens If You Get the Size Wrong
Instagram doesn't reject wrong-sized images — it compresses and resizes them. That's actually worse than a rejection, because you end up with a grid that almost works but has visible seams, misalignment, or fuzzy text. I've seen grids where one slice was 1079px instead of 1080px, and the seam was visible on a phone screen.
Save Yourself the Math
If you don't want to think about pixel math, SplitX handles all of this in your browser. Upload your image, pick your grid type, and download perfectly sized slices. Nothing gets uploaded to any server — it all runs locally.