Dynamic change in body size?

[Hromon]

The only way I've found to resize the body is to resize the form, but that will resize all bodies that use that shape(?). How can I change the size of one body without creating many identical shapes?

[RossNordby]

If two bodies have different size shapes, they have to have distinct shape instances. Bodies do not have a Scale property anywhere. (Including a per body Scale separate from the shape would kill some optimization opportunities and make things significantly more complex, often resulting in more expensive general purpose collision detection algorithms.)

I wouldn't worry about creating more shapes, especially if you're talking about Box/Sphere/Capsule/Cylinder. ConvexHull is a little heavier, but you'd still need a lot of them to run out of memory.