Image Dimensions

Checks for width/height attributes (prevents CLS)

Rule ID	images/dimensions
Category	Images
Scope	Per-page
Severity	warning
Weight	4/10

Solution

Specifying width and height attributes prevents Cumulative Layout Shift (CLS) by reserving space before images load. Add width and height attributes to img tags matching the image’s intrinsic dimensions. Use CSS for responsive sizing if needed. For responsive images, the aspect ratio from width/height prevents layout shifts even when CSS overrides the actual size.

Enable / Disable

Disable this rule

[rules]
disable = ["images/dimensions"]

Disable all Images rules

[rules]
disable = ["images/*"]

Enable only this rule

[rules]
enable = ["images/dimensions"]
disable = ["*"]