Leveraging my experience as both a Vinted user and a seasoned product designer, I conducted a study to update sections of the app without requiring a complete redesign. My focus was on how to improve the design with a user-centered approach to address legibility and visibility.

While WCAG doesn't set a specific minimum font size or recommend particular typefaces, adhering to a few general best practices ensures optimal readability. Body text should be a minimum of 12 points (pt) or approximately 16 pixels (px), and it's advisable to avoid using text sizes smaller than 9pt (12px).

Overall feedback for the design updates was very positive, despite the small sample size of 6 users compared to the active user base on Vinted. Notably, all users preferred the updated designs. The project demonstrated how addressing legibility and visibility problems can improve user satisfaction without the need for a full redesign.

A/B testing the updated designs on a larger pool would reveal better findings. While this study exclusively addresses the light mode, it's worth noting that Vinted's current dark mode fails to meet WCAG standards for contrast.