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How to Choose the Best Font Size for Website Call to Actions: Boosting Conversions and User Engagement

Vlad Niculescu
Vlad Niculescu

CEO @ Flowpoint

11 February 2024

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How to Choose the Best Font Size for Website Call to Actions: Boosting Conversions and User Engagement

Are your call-to-action (CTA) buttons losing their effectiveness amid the chaos of your website's design? Or, have you been wondering how to encourage more users to complete desired actions? This is where the often-overlooked task of selecting the best font size for your website's CTAs comes into play. In this article, we will highlight the factors influencing the optimal font size and provide tips to help you make better design decisions that can significantly impact user engagement and conversion rates.

Why is Font Size Important for CTAs?

Call-to-action buttons play a vital role in guiding users towards the intended target actions, such as signing up for a newsletter, downloading a resource, or making a purchase. Designing these buttons with an appropriate font size affects how users perceive and interact with them. A carefully chosen font size enhances readability, user experience (UX), and conveys a sense of urgency or priority that motivates users to complete the desired action.

The Ideal Font Size for Your CTA Buttons

There isn't a one-size-fits-all answer, as the optimal font size for CTAs can vary depending on several factors. Here are the key aspects to consider when determining the best font size for your website's CTAs:

1. Device and Screen Size

The devices and screen sizes your target audience uses can significantly influence your CTA font size decisions. For example, mobile devices require larger font sizes for better visibility and easier tap targets, while desktop users may appreciate slightly smaller fonts.

2. Audience Demographics

Consider the unique characteristics of your audience, such as age and visual acuity. Older users or those with impaired vision may require larger font sizes for better readability.

3. Relationship with Surrounding Elements

CTA buttons should stand out against other design elements on your website. This is where the strategy of visual hierarchy comes into play. Making sure your CTAs are larger than surrounding text and clearly visible can encourage users to click.

4. Brand Guidelines

Your brand's guidelines may influence your choice of font size for CTAs. Ensure that the chosen font size aligns with your overall brand strategy and maintains consistency across your digital presence.

Tips for Optimizing Your CTA Buttons' Font Size

Here are some practical tips to help you optimize your CTA font size for better conversions and user engagement:

  1. Aim for a Minimum of 16px Font Size: As a general rule, your CTA font size should be at least 16px to ensure legibility.
  2. Maintain Proportions: Strike a balance by maintaining a proportional relationship between the font size of your CTA buttons and the surrounding text. As a guideline, opt for a font size around 20% larger than your body text.
  3. Test Different Sizes: Conduct A/B tests to determine which font size resonates best with your audience and leads to higher engagement and conversions.
  4. Consider Visual Hierarchy: Your CTAs should always stand out. Achieve this by combining a larger font size with contrasting colours, whitespace, and bold typography.

In conclusion, the best font size for your website's CTAs depends on a combination of factors unique to your business and target audience. By considering these factors and implementing these tips, you can improve your website design, enhance user experience, and ultimately boost your conversion rates with well-optimized font sizes in your CTAs. To gain further insights into optimizing your website's performance, consider using tools like Flowpoint.ai, which harnesses AI to analyze user behaviour and offer valuable recommendations for driving better conversions.


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