---
title: "IAB Fixed Size 970x250 Specs | Clean Digital"
description: "Check IAB Fixed Size 970x250 specs for dimensions, aspect ratios, file types, QA checks and verified official sources."
canonical: "https://cleandigital.co.uk/tools/ad-spec-library/iab/fixed-970x250"
image: "https://cleandigital.co.uk/images/resources/previews/ad-spec-library-poster.png"
content_signal: "ai-train=no, search=yes, ai-input=yes"
---

# IAB Fixed Size 970x250 specs

Includes initial load and subload weight guidance.

Platform IAB

Media type image/html

Campaign type Display

Placement Fixed Size Unit

[Build a cross-platform creative brief](https://cleandigital.co.uk/tools/ad-spec-library)

## Technical requirements

Confirm these limits before final export. Where a field is not specified, check the linked platform source before trafficking the asset.

Dimensions 970 × 250 px

Minimum dimensions Not specified

Aspect ratio 970x250

File types JPG, PNG, HTML

Maximum file size Not specified

Duration Not specified

Maximum initial load 250 KB

Maximum subload 500 KB

Initial and subload weights apply.

## Creative QA checklist

1. Confirm exact canvas dimensions
2. Check initial file weight before trafficking
3. Validate subload asset budget

## Sources and verification

Check the official source again when a campaign has unusual delivery or format requirements.

- [IAB Tech Lab Fixed Size Spec](https://www.iab.com/wp-content/uploads/2019/04/IABNewAdPortfolio_LW_FixedSizeSpec.pdf)

 Last verified 5 March 2026

[IAB documentation](https://www.iab.com/)

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