- Success Criterion 1.3.3
- Conformance level A
Instruction That Identifies a Button Only by Its Size
1.3.3 — Sensory Characteristics
Scenario
Setting
A weather app's forecast screen
What’s wrong
"Press the large button" / size-only identification.
Example
Watch a weather app's forecast screen closely and you'll spot this: "Press the large button" / size-only identification.
Why it matters
Blind, low-vision, and color-blind people when instructions mention only appearance or sound. Here, on a weather app's forecast screen, the result is they lose track of what belongs to what.
How to test
Read the instruction alone: 'press the large button' relies on relative size — check for a stated label instead.
How to fix
Instructions must name the control or content in text, not only by shape, color, size, position, or sound.
Outcome
After the fix, the same visitor to a weather app's forecast screen can now understand how the page is organized, specifically for the “Instruction That Identifies a Button Only by Its Size” issue on a weather app's forecast screen.
Who is affected
Blind, low-vision, and color-blind people when instructions mention only appearance or sound.
Learn more
- Understanding Understanding document (opens in a new tab)
Related scenarios
- Instructions That Identify Something Only by Shape or Position
- Instruction Given Only Through an Icon, With No Text Meaning
- Instruction That Tells Users to Click ‘the Green Button’
- Instruction That Says ‘See the Sidebar’ With No Other Locator
- Instruction That Relies on an Audio Cue With No Visual Backup
- Instruction That Relies on a Swipe Direction With No Named Alternative