What is a good profit margin of a product in a small business?

A good profit margin depends on various factors like the selling price of goods and the size of the business. However, for a small e-commerce business, a good profit margin is above 20% and depends on whether sales are high enough compared to the costs.

Remember, that at the root of it all is having the correct product to sell to the correct market, at the correct price. Optimize those 3 elements, and you're well on your way to excellent profit margins.