Virtual backgrounds are one of the few image specs that are genuinely simple — and then three non-obvious problems make people think they got the size wrong.
The Dimensions
- 1920 × 1080 px (16:9) works on Zoom, Microsoft Teams, Google Meet and most other tools.
- Minimum: 1280 × 720. Anything smaller looks soft when stretched.
- Maximum file size: Zoom accepts up to 15 MB, Teams and Meet are similar — but there's no reason to exceed 1–2 MB.
- Format: JPG or PNG, 24-bit. Use JPEG for photographic backgrounds, PNG only if the image contains crisp text or flat graphics.
- Aspect ratio matters more than size: a non-16:9 image gets cropped or letterboxed, usually cutting the sides where people put logos.
Why Your Text Appears Backwards
Meeting apps show *you* a mirrored self-view, because that's what feels natural. Any text in your virtual background will therefore look reversed to you while appearing correct to everyone else.
Most platforms have a "mirror my video" toggle that affects only your own preview. Before flipping your background image to "fix" it, ask a colleague what they see — nine times out of ten it was already correct, and pre-flipping it is what actually breaks it.
Design Rules
- Keep the centre clear. Your head and shoulders occupy the middle third; anything there is hidden.
- Put content in the upper corners, and keep it away from the edges by ~5% since some platforms crop slightly.
- Blur or simplify. A busy background competes with your face and makes the segmentation edge more visible. Slightly blurred or low-contrast backgrounds look the most professional and key the most cleanly.
- Text should be large and high-contrast — assume the viewer sees you in a small tile in a grid of twenty people.
- Avoid pure green backgrounds unless you're actually using a green screen.
Stopping the Edge Flicker
Halos and flickering edges are a segmentation problem, not an image problem:
- Light your face from the front. Backlighting (a window behind you) is the number one cause of a broken outline.
- Increase contrast between you and your real wall — avoid wearing a colour close to the wall behind you.
- Avoid movement behind you; a person walking past confuses the model.
- Use a plain real background if possible; the model has an easier job when the real scene is simple.
- Wear solid colours, not fine patterns, and avoid loose hair strands if the edge quality really matters.
If your platform offers a real green-screen mode, a physical backdrop plus even lighting still beats any AI segmentation for edge quality.