Resizing sounds trivial until LINE rejects your file. The issue is rarely the act of resizing — it is resizing to the wrong dimensions, or doing it in a way that blurs or distorts the art. This guide covers the correct target size and the method that keeps your sticker sharp and accepted.
Why size matters
LINE displays stickers in fixed canvases. Upload at the wrong size and the app either rejects the file or forces it to fit, which can squish a round face into an oval. Matching the spec up front means:
- No rejection during submission.
- No automatic distortion of your art.
- Consistent look next to other stickers in a chat.
The exact numbers — main, tab, and popup — are in the LINE sticker size & format guide → For resizing, the one you care about most is the main canvas: 320 × 320 pixels.
The correct target
- Main sticker: 320 × 320 px (the one users tap and send).
- Tab image: 96 × 74 px (the small icon in the sticker tray).
- Popup: 240 × 240 px (the enlarged preview).
When people say “resize for LINE stickers,” they almost always mean the 320×320 main. The others are derived smaller versions.
How to resize without ruining it
1. Start from a larger source
Shrinking looks fine; enlarging a small image looks blurry. Always begin with a source bigger than 320×320 so you are downscaling, not upscaling.
2. Keep the aspect ratio
If your art is not square, do not stretch it into 320×320 — that causes the squish. Instead, place the art on a 320×320 canvas and center it, leaving transparent padding around it. The file is square; the subject does not have to fill it.
3. Use the cutter’s resize
In the HailouTec Sticker Cutter, after cropping, set the output to 320×320. It fits your subject into the square and keeps the surrounding area transparent, so you get a valid file without manual artboard setup.
4. Export as PNG
PNG preserves both the sharp edges and any transparency. JPEG would soften the art and drop the transparency.
Mistakes that cause rejection
- Wrong dimensions. A 500×500 or 300×300 file is off-spec. Hit 320×320 for the main.
- Stretching non-square art. Distortion looks bad and can trip review. Pad instead of stretch.
- Upscaling a tiny image. Starts blurry, ends blurrier. Use a bigger source.
- Saving as JPEG. Softens edges and kills transparency. Export PNG.
FAQ
Can I make the sticker fill the whole 320×320?
You can, if your art is square. If it is not, padding with transparency looks better than stretching. Either way the file itself should be 320×320.
Does resizing reduce quality?
Downscaling from a larger source barely changes quality. Upscaling from a smaller one does. Start big.
What if my art is a rectangle, not a square?
Center it on a 320×320 transparent canvas. LINE shows stickers in a square, so the padding is normal and expected.
Do I need different sizes for one sticker?
The main (320×320) is required; the tab (96×74) and popup (240×240) are smaller derived versions. The size guide → lists all three.
Open the free LINE sticker cutter → and resize your first image to a clean 320×320 in seconds.