Scaling Around a Center Point

You can perform the scaling around a center point. To stay the width of the outline same while the object becomes larger, you can divide the stroke-width by the scaling factor.

Example

<!DOCTYPE html>
<html>
<body>
<svg width="300px" height="300px" viewBox="0 0 200 200">

<circle cx="50" cy="50" r="3" style="fill: black;" />
<g id="p1" style="stroke: black; fill: none;">
<rect x="35" y="40" width="30" height="20" />
</g>

<use xlink:href="#p1" transform="translate(-50,-50) scale(2)"
 style="stroke-width: 0.4;" />
<use xlink:href="#p1" transform="translate(-75,-75) scale(2.5)"
 style="stroke-width: 0.4;" />
<use xlink:href="#p1" transform="translate(-100,-100) scale(3)"
 style="stroke-width: 0.33;" />

</svg>
</body>
</html>

Test it Now

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