def pred_thinness(depth, cuts=[0.1,0.2,0.4]):
    """
    Rates object thinness/thickness based on measured depth
    """
    if depth <= cuts[0]: return 'flat'
    elif depth > cuts[0] and depth <= cuts[1]: return 'thin'
    elif depth > cuts[1] and depth <= cuts[2]: return 'thick'
    else: return 'bulky'