How to Create a SKU Naming Convention That Prevents Product Errors

A SKU naming convention gives every product a consistent internal identity. Without one, employees may create different codes for similar items, reuse old codes, or rely on descriptions that are difficult to search and interpret. These errors can lead to incorrect orders, inaccurate stock counts and confusion between sales and purchasing teams.

A good SKU should be unique, consistent and easy for people to understand. It should identify a product without trying to contain every detail about it. Product names, specifications and prices can change, while an internal code should remain stable whenever the underlying item is still the same.

Before creating codes

• 1. Decide what makes two products different.

Separate products when a difference affects what a customer receives, what a supplier ships, how an item is stocked, or how it is priced. Common examples include size, color, material, packaging quantity and model version. Do not create separate codes for differences that do not affect identification or handling.

• 2. Choose a simple code structure.

Use a consistent pattern based on useful categories, such as product group, item type and variant. For example, a business selling workwear might use codes beginning with WRK, followed by a garment category and a short variant identifier. Keep the structure short enough to type accurately and explain it in a written standard.

Avoid embedding information that changes frequently, such as supplier cost, selling price, warehouse location or promotional status. If those details change, changing the code can split the history of one product across multiple identities.

• 3. Set rules for letters and numbers.

Choose whether codes will use uppercase letters, numbers or both. Avoid characters that are easily confused, such as the letter O and the number zero, or the letter I and the number one. Do not use spaces, punctuation or inconsistent separators unless there is a clear reason to do so.

Decide how variants will be ordered. For instance, sizes could follow a fixed sequence, while colors could use approved abbreviations. Write down the approved abbreviations rather than allowing each employee to invent their own.

• 4. Reserve codes only once.

Before assigning a new code, search existing records and compare the proposed product with similar items. Check the description, supplier reference, packaging and physical characteristics. A code should never be reused for a different product, even if the original item is no longer sold.

If a product is discontinued, mark it as inactive according to your internal procedure, but preserve its code for historical transactions and documents. Reusing it can make older records appear to refer to a different item.

• 5. Test the convention with real examples.

Create sample codes for your most common product families, including products with multiple sizes, colors, packs and suppliers. Ask employees from sales, purchasing, inventory and accounting to interpret the codes without assistance. If two people reach different conclusions, simplify the pattern or improve the written rules.

• 6. Control who can create new codes.

Assign responsibility to a small number of trained people. Require a request to include the product description, supplier reference, unit of measure, variant details and evidence that the item is not already represented. Review the request before the code becomes available for daily use.

Maintaining quality

Review the naming convention periodically, especially after adding a new product category or changing packaging. Measure duplicate codes, incorrect orders and manual corrections. These problems show where the rules are unclear. A reliable convention is not the most detailed one; it is the one employees can apply consistently without guessing.