This is a product details page for a mobile phone. For the products in "Product Management", there may be differences in memory size, color distinction, size and model;
At the same time, because of these differences, the inventory and prices will be different. For example, the prices of 32G memory and 64G content are definitely different. 32G is in stock, but 64G may be out of stock.
Then, the "Specification Size" in product management is used for this.
So, just like if I were selling iPhones, I might set the specifications like this:
# Create specification and size data
Create a new specification, name it "Body Color", and then create the following sub-attributes under this specification: red, white, gray, gold
Create a new specification, name it "Memory Size", and then create the following sub-attributes under this specification: 32GB, 64GB, 128GB
# Edit product settings sku
Then edit the product, select these specifications, and then set different prices and inventory quantities for the products with different specifications.
When users are shopping, they can easily choose products of different sizes as shown in the picture above.