character falls through the floor

I’ve made a mesh for the player character in a game project.

but when I hit “p”, this happens

How do I keep her feet from falling through the floor?

that is a physics problem try extending the bounds or setting it to convex hull.

How do I extend the bounds?

Try radius or collision bounds : convex hull in drop down; under physics tab, make sure actor is set and on the plane static collision bounds. or try using a stretched cube, scaled under edit mode. I remember reading somewhere phys engine has trouble with open objects.

Thanks guys. I tried the radius and it allowed me to change the collision bounds, but after tooling around with it I think I’ll use convex hull.