HTML CSS using mostly flexbox

Solution retrospective
Is it ok to use rem or em for width when making card components like this and the QR code challenge? Or should I be using units like %?
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- @OkaforRaph
Hey @ Minwoo Soh, congratulations on completing the challenge... U did a very good job with the component. As for your question, ''rem" is a more suitable unit to use for width and height than em
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