While the base model number stays consistent, additional codes like factory designations, sequence numbers, and lot numbers assign unique identities to each phone to facilitate tracking. For example, a "-01" after the serial number may indicate the first production lot after the initial run. SKU vs. serial number: key similarities and A stock keeping unit (SKU) is used by vendors to keep track of a product's inventory based on its relevant attributes. Stock keeping units (SKUs) influence product assortment, which greatly impacts consumers' category-level purchasing, brand-level purchasing, store-level shopping frequency, and store choice. SKUs are used to manage Typically, though, SKUs are made up of 8-10 letters and numbers that are representative of the product's unique features (such as color, size, model number, product number, etc.). For example, say that a t-shirt company wants to create a SKU for a green V-neck t-shirt, size 6, from the collection released in November of 2009. Aliexpress do not make these product Ids easily visible. To find Product ID go to the page of the necessary product at AliExpress.com and find its digital number in the URL. Open Aliexpress.com in a browser. See URL. After the name of the product, You'll find the product id in the url as visible in the below image. Then create gross profit ranges in your spreadsheet (less than $20, $20-$29.99, etc.) and note how many SKUs fall in each range. Divide the number of SKUs in a range by the number of total SKUs (and multiply by 100) to get your SKU ratio for each range. Calculating sales ratio. Using the same gross profit ranges, note the number of units sold You can use both letters and numbers in your SKU code. This allows you to include all pertinent identifiers in the code, ranging from the manufacturer, to the model, to the color, to the size. Be wary of how you use capitalization that makes characters look like both letters and numbers in your codes, such as a capital "O" and the number If you are selling the same products on two different Amazon stores, Amazon will assign different SKUs to those products. So, on one store the SKU for a small blue t-shirt could be ST-21-GRO-5, and the same product on another store could be XY-52-ZTW-06. Keeping track of the number of units sold across channels then becomes challenging. A stock-keeping unit, commonly known as the SKU, is a unique identifier in the form of an alphanumeric code allotted to a particular item or inventory sold by the retailer. The SKU helps retailers keep track of their stock and determine the volume of sales based on the category and the product. For example, you might decide you want to create an SKU system for your clothing. You could make the first number stand for the department (1 for men, 2 for women, 3 for children), the second for the type of apparel (1 for tops, 2 for bottoms, 3 for accessories), the third for the color, and so on until you create a code long enough that each product has a unique sequence. 3 Answers. SKU is the stock keeping unit. The unit miantained in stores. It may be same as basic unit of measure. SKU is nothing but a product. For example, if it is Samsung the Galaxy Note 4 is its product. Moreover, SKU can also consider as a material in some specifications. CwSi.