70.7% of Wix sites use unsized <img> image dimension sizing, and 98% of those sites have a good CLS, against 98% of all Wix sites.
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 5,333 with all devices field data · 5,599 sites with image dimension sizingBy Arjen Karel · corewebvitals.io/state-of-cwv
Sites with unsized <img> image dimension sizing have a good CLS most often: 98%, against 98% of all Wix sites. Sites with explicit width and height image dimensions have it least often, at 98%.
SitesGood, needs improvement, poor CLSMedian
All Wix sites5,33398%0.00
Unsized <img> (no width/height or aspect-ratio) 70.7%3,78798%0.00
Explicit width & height attributes 97.8%5,19998%0.00
GoodNeeds improvementPoorSites: with Chrome field data
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 5,333 with all devices field data · 5,599 sites with image dimension sizingBy Arjen Karel · corewebvitals.io/state-of-cwv
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Image dimension sizing usage
Explicit width and height is the most used: 97.8% of Wix sites. Unsized <img> is 70.7% of Wix sites.
Sites using each option (sites can use more than one) 5,599 sites
Explicit width & height attributes 97.8% Unsized <img> (no width/height or aspect-ratio) 70.7%
Explicit width & height attributes 97.8% Unsized <img> (no width/height or aspect-ratio) 70.7%
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 5,333 with all devices field data · 5,599 sites with image dimension sizingBy Arjen Karel · corewebvitals.io/state-of-cwv
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Image dimension sizing per framework
React sets the image dimension sizing to unsized <img> on 71% of its sites, and 98% of React sites have a good CLS, against 98% of all sites.
FrameworkImage dimension sizing on its sitesGood CLS
Wix sites with image dimension sizing 5,599 sitesExplicit width & height attributes 98%Unsized <img> (no width/height or aspect-ratio) 71%98%
React 5,598 sitesExplicit width & height attributes 98%Unsized <img> (no width/height or aspect-ratio) 71%98% Explicit width & height attributes Unsized <img> (no width/height or aspect-ratio)
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 5,333 with all devices field data · 5,599 sites with image dimension sizingBy Arjen Karel · corewebvitals.io/state-of-cwv
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Image dimension sizing or the framework
Does the framework explain the image dimension sizing difference?
On React, 98% of sites with unsized <img> image dimension sizing have a good CLS, against 98% of React sites with explicit width and height. Within React, sites with unsized <img> and explicit width and height have a good CLS about equally often.
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 5,333 with all devices field data · 5,599 sites with image dimension sizingBy Arjen Karel · corewebvitals.io/state-of-cwv