This box has a width of 250px, a margin of 10px, a border of 5px, and padding of 10px.
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Lorem ipsum
The width and height of every floated container element depends on the amount of content (text or images) inside the container. This is the shrink-to-fit model. If this div has a lot of text, so that the div is as wide as the page, the float property would have no effect.