Unlike checkboxes, radio buttons allow only one selection. They show empty circles for unselected and filled dots for selected states.

Key principles for radio button design:

• Use for two or more mutually exclusive options
• Align options vertically for better scanning — horizontal layouts need more space between buttons and labels
• Choose radio buttons over dropdowns for fewer than 5 options to reduce the interaction cost
• Set research-based default selections that match common user choices
• Make both button and label tappable
• Maintain standard circular design to ensure familiarity.^[1]