def calc_verts_bounds(verts):
    """ Determine the bounds size of the verts
    (assumes verts(mesh) is facing forward(y+))
    """
    sort_x = sorted([v.co.x for v in verts])
    sort_y = sorted([v.co.y for v in verts])
    sort_z = sorted([v.co.z for v in verts])
    width = sort_x[-1] - sort_x[0]
    height = sort_z[-1] - sort_z[1]
    depth = sort_y[-1] - sort_y[1]
    return width, height, depth