There are several measures of sustainable growth, including:

1. Organic growth: This is the growth rate a company can achieve without relying on external factors such as mergers and acquisitions. It is calculated by subtracting the company's current growth rate from its total growth rate.

2. Return on equity (ROE): This measures the company's profitability by comparing its net income to its shareholders' equity. A high ROE indicates that the company is generating a strong return on its investments.

3. Debt-to-equity ratio: This measures the company's financial leverage by comparing its total debt to its shareholders' equity. A low debt-to-equity ratio indicates that the company is relying less on debt to finance its operations.

4. Cash flow: This measures the amount of cash a company generates from its operations. A positive cash flow indicates that the company is generating enough cash to fund its growth and operations.

5. Environmental impact: This measures the company's impact on the environment, including its carbon footprint, water usage, and waste generation. A sustainable company will strive to minimize its environmental impact.

6. Social responsibility: This measures the company's impact on society, including its treatment of employees, customers, and communities. A sustainable company will prioritize social responsibility and ethical business practices.