Hi, I’m not really sure I follow the examples you are showing, do you have a link to a project where and can describe what’s the issue that’s confusing? In general, heading is about interior spacing and margin is about exterior spacing, so with and heights are not supposed to include margin, but you might be referring to a specific situation in your screenshots
Thanks for elaborating, I get what you’re saying - yes is because width:stretch translates into (roughly) width:100%, which doesn’t account for margin in flex containers (you can try this in CSS as well)
You can make items stretch excluding margin by ignoring (unsetting) the width setting (so it’s no longer setting width:100%) and dropping down to specifying things the way you would in CSS:
• Set align-self:stretch on the child, or
• Set align-items:stretch on the parent (causes everything to stretch)