1
At a glance the headline numbers for Images per page
How many images the page renders and their over-the-wire weight.
21
image count
on the typical page
1.1 MB
image weight
on the typical page
2.8 MB
1 in 4 pages exceed this
image weight
190,130
sites measured
desktop field data
The typical page serves 21 images weighing 1.1 MB.
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2
Distribution & median CLS site count and median CLS at each level of images per page — n
0.00 0.04 0.08 0.11 0.15
0 13970 27940
0–4 5–9 10–14 15–19 20–24 25–29 30–34 35–39 40–44 45–49 50–54 55–59 60–64 65+
Good (≤0.1) Needs improvement Poor (>0.25) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS by images per page — n which level passes the CLS most often
Images per page — nSitesPassing CLSCLS
0–4 27,940 80% 0.01
5–9 19,827 80% 0.02
10–14 22,004 79% 0.02
15–19 21,116 81% 0.02
20–24 18,466 79% 0.02
25–29 15,032 78% 0.03
30–34 12,107 76% 0.03
35–39 9,509 75% 0.03
40–44 7,471 77% 0.03
45–49 5,905 77% 0.03
50–54 4,805 77% 0.03
55–59 3,828 75% 0.04
60–64 3,097 77% 0.04
65+ 19,023 74% 0.04
Good Needs Improvement Poor Faded rows: under 100 sites
Images per page — n 21. p75 38. p99 177. At the low end (0–4): CLS 0.01. At the high end (65+): CLS 0.04. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
4
Distribution & median CLS site count and median CLS at each level of images per page — size
0.00 0.04 0.08 0.11 0.15
0 29090 58179
0–499 500–999 1000–1499 1500–1999 2000–2499 2500–2999 3000–3499 3500–3999 4000–4499 4500–4999 5000–5499 5500–5999 6000–6499 6500+
Good (≤0.1) Needs improvement Poor (>0.25) Site count
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
5
Passing CLS by images per page — size which level passes the CLS most often
Images per page — sizeSitesPassing CLSCLS
0–499 58,179 80% 0.02
500–999 30,515 79% 0.03
1000–1499 20,139 78% 0.03
1500–1999 14,364 77% 0.03
2000–2499 10,613 76% 0.03
2500–2999 7,879 75% 0.03
3000–3499 6,229 76% 0.04
3500–3999 4,909 76% 0.03
4000–4499 4,071 76% 0.03
4500–4999 3,170 74% 0.04
5000–5499 2,836 75% 0.03
5500–5999 2,359 72% 0.04
6000–6499 1,999 71% 0.04
6500+ 18,176 74% 0.04
Good Needs Improvement Poor Faded rows: under 100 sites
Images per page — size 1.1 MB. p75 2.8 MB. p99 26.3 MB. At the low end (0–499 KB): CLS 0.02. At the high end (6500+ KB): CLS 0.04. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
6
Why this matters for the Core Web Vitals, and where to start fixing it
Image count and image weight are the bulk of most pages. Those bytes compete with the LCP image for bandwidth: the browser downloads gallery thumbnails while the hero is still streaming. More images also means more decode work, and decoding is not free on a cheap phone.
Fewer, smaller, later. Cut the decorative ones, right-size the rest, lazy-load below the fold. The format and loading splits in the explorer show where to start.
Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.