According to the Risk Assessment and Management: A Complete Guide, risk magnitude is the product of the likelihood and impact of a risk scenario. Risk magnitude is an important factor to consider before choosing risk treatment options, as it indicates the level of exposure andpotential harm that the organization faces from the risk scenario. Risk treatment options should be selected based on the risk magnitude, as well as the risk appetite and tolerance of the organization. For a scenario with significant impact, the risk magnitude is likely to be high, and therefore the risk treatment options should aim to reduce the likelihood and/or impact of the risk scenario as much as possible, or to transfer or avoid the risk altogether. Reference = Risk Assessment and Management: A Complete Guide, ISO 27001 Risk Assessment & Risk Treatment: The Complete Guide