Craft\Imager_ImageModel::getSize PHP Method

    function getSize($unit = 'b', $precision = 2)
    {
        $unit = strtolower($unit);
        switch ($unit) {
            case "g":
            case "gb":
                return round((int) $this->size / 1024 / 1024 / 1024, $precision);
                break;
            case "m":
            case "mb":
                return round((int) $this->size / 1024 / 1024, $precision);
                break;
            case "k":
            case "kb":
                return round((int) $this->size / 1024, $precision);
                break;
            default:
                return $this->size;
        }
        return $this->height;
    }