Rounded corners vs sharp edges in UI design: What's best for your interface?

design
Sai Pavan
September 3, 2024

In the ever-evolving world of UI design best practices, the debate between rounded corners and sharp edges continues to spark discussions among designers and marketers alike. At zazzy, we've seen trends come and go, but this particular design choice sticks around, constantly challenging us to rethink our approach. So, let's dive into this shapes showdown and figure out which one might give your interface the edge it needs (pun intended, of course).

The curvaceous appeal of rounded corners

Ever noticed how nature doesn't do straight lines? From mountain peaks to flower petals, curves dominate the natural world. Our eyes have grown up with rounded shapes, making them comfortable old friends in any design.

But it's not just about familiarity. Research suggests that our brains process rounded shapes faster than their angular counterparts. It's like the difference between a smooth jazz tune and a heavy metal riff – both have their place, but one's definitely more accessible to the ears (and, in this case, the eyes).

Remember when your parents kept you away from sharp objects as a kid? That instinct carries over into adulthood. Rounded corners subconsciously communicate safety and approachability. They're the design equivalent of a warm hug, inviting users to engage without fear of metaphorically poking an eye out.

When guiding the user's gaze, rounded corners are like a well-designed highway. They lead the eye smoothly around each bend, creating a natural flow of information. On the other hand, sharp corners can act like sudden stop signs, jarring the visual journey.

The sharp edge of professionalism

But before we get too cozy with our curves, let's give sharp edges their due. There's a reason why professional companies, for example, law firms, aren't rushing to round off their logos. Sharp corners convey professionalism, seriousness, and attention to detail. They're the power suits of the design world – commanding respect and focus.

When you need to grab attention quickly, nothing beats a sharp corner. It's like the pointed finger of design, directing users exactly where you want them to look. In a sea of rounded interfaces, a few strategic sharp edges can make your key elements stand out like a sore thumb (in a good way).

The brain game: How we process shapes

Our brains are fascinating organs, and we have strong opinions about shapes. Studies have shown that we process rounded shapes more quickly and with less cognitive effort. It's like the difference between sliding into a booth at your favorite diner versus perching on a barstool – both get the job done, but one feels more natural.

Sharp corners, while attention-grabbing, can be more tiring for the eyes over extended periods. If your interface requires long user sessions, this is something to keep in mind. You don't want your users to feel like they've been staring at a pile of Legos all day.

Interestingly, rounded corners tend to draw the eye inward, focusing attention on the content within. Sharp corners, conversely, pull focus to the edges. Depending on what you want users to concentrate on, this subtle difference can be a powerful tool in your design arsenal.

Riding the wave: Current trends and conventions

If you've been paying attention to the digital landscape lately, you may have noticed rounded corners taking over. From social media apps to e-commerce sites, smooth edges have their moment in the sun. But like all trends, it's important to consider whether it's right for your specific needs.
Sharp corners haven't gone extinct. They're still holding strong in more traditional or formal sectors. Just look at Microsoft's website – those crisp edges mean business.
One word of caution: mixing rounded and sharp corners in the same interface is like wearing plaids with stripes. It can work, but it takes a very skilled designer to do so without causing visual chaos. The key is to maintain consistency and ensure that the choice of corners aligns with the overall design context and brand identity.

When to embrace the curve

For instance, buttons and cards are prime real estate for rounded corners. They soften the interface and make clickable elements feel more... well, clickable. Full rounded corners on call-to-action buttons are particularly effective, creating a friendly invitation to engage. On the other hand, sharp corners can be used when you need to draw attention, such as for containers that house critical information or actions you want users to notice.
Rounded corners also excel at creating visual separation between elements. They're like the friendly neighbors of design, clearly defining spaces without building walls.

Sharpening your focus: When to use edges

Sometimes, you need to draw attention, and nothing does that quite like a sharp corner. Use them for containers that house critical information or actions you want users to notice.
Interestingly, while individual buttons often benefit from rounded corners, grouped buttons can look more cohesive with sharp edges. It's all about context and purpose.
If you have an element that needs to stand out from an otherwise rounded interface, strategically using sharp corners can do the trick. It's like wearing a crisp collar with an otherwise casual outfit – adding the right touch of formality and focus.

Making the right choice for your interface

At the end of the day, the choice between rounded corners and sharp edges isn't about following trends or personal preference. It's about what works best for your users and your brand.

Consider your overall design context. What's your brand's personality? What kind of emotional response do you want to evoke? A playful app might lean heavily toward rounded corners, while a financial platform might opt for a mix of both to balance approachability with professionalism.

Remember, good design isn't just about looking pretty. It's about creating an intuitive, enjoyable experience for your users. Rounded corners, with their cognitive processing advantages and ability to create a welcoming atmosphere, can be a reassuring choice for your design strategy.

The key is to align your choice with your brand identity and goals. At zazzy, we've found that a thoughtful combination often yields the best results. Use rounded corners to create a friendly overall feel, then strategically employ sharp edges to highlight key areas or actions. This approach can inspire you to experiment and innovate in your design strategy.

In conclusion: Shaping up your design strategy

The rounded vs sharp debate isn't about crowning a winner. It's about understanding the psychological and practical implications of each choice and using them strategically to create interfaces that not only look good but feel good to use.

Whether you're a team curve or a team edge, the most important thing is to design with purpose. Every corner (or lack thereof) in your interface should be a conscious choice, serving the overall user experience and business goals. So, next time you're crafting an interface, take a moment to consider the humble corner. It might just be the secret weapon in your design arsenal, helping to shape your UI and your users' entire experience with your brand.

Remember, mastering UI design best practices isn't just about following trends. It's about understanding the principles behind them and applying them thoughtfully to create interfaces that genuinely resonate with users. Whether you're adjusting the border radius of a button or deciding on your site's overall aesthetic, every choice should be driven by a deep understanding of user experience best practices.

At zazzy, we're committed to staying on top of the latest UI UX best practices while never losing sight of the fundamental principles that drive effective design by balancing aesthetics with functionality and always keeping the user's needs at the forefront.

So, whether you're team border round or prefer the crisp look of sharp edges, remember that the best design is always the one that serves your users and your brand most effectively. And that's a corner we're always happy to help you turn.

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