Designing a high-quality icon set can be challenging sometimes
Be Clear – An icon’s primary goal is to communicate a concept quickly
Make it readable – Once you have an understandable symbol, make sure it’s readable
Keep consistency – To achieve harmony for an icon family, maintain the same stylistic rules throughout
Always test – Check for consistency. Make sure the icons work in context, at the relevant sizes. Also. make sure they work in harmony with the larger visual system.