Your Ad Is Working. The Customer Just Can't Find the Size They Want

The dashboard shows traffic. The page is getting visits. The product looks available. But sales drop. Opening the size grid reveals stock sitting in the variants nobody wants, while the color, size, or version the ad attracts most is sold out.

Available stock isn’t sellable stock

If a shirt has a hundred units in stock but the most requested size is at zero, those hundred units don’t represent a hundred equal chances at a sale. Demand doesn’t buy “any size.”

How the broken grid forms

The store keeps paying for ads promoting a product whose most desired combination can’t be purchased. The creative gets the person to arrive. Availability sends them away.

Cross-referencing the two numbers that matter

The first step is combining which products attract and sell the most, with which variants inside those products concentrate demand. Total SKU-level stock isn’t enough. It needs to be broken down size by size, color by color, version by version.

Sorting the gaps

• Out-of-stock variant with high demand: priority restock
• In-stock variant with low demand: capital sitting idle
• Low demand and low margin variant: candidate to drop from the grid
• New variant: controlled test

Connecting the read to traffic

If the variant shown in the ad is unavailable, pause or adapt the creative. If a close alternative is in stock, point the messaging there instead. Attracting a customer with a promise the catalog can’t fulfill wastes the click that got them there.

Reordering before the stockout, not after

Sales velocity
        +
Production lead time
        +
Transport time
        +
Safety margin
        =
The point to reorder

When the reorder happens after stock hits zero, the campaign has already started losing momentum by the time new stock lands.

Where the gap gets caught early

At Flow Border, a dedicated account helps with communication with China, stock negotiation, and tracking the supply chain, with the goal of catching the bottleneck while it’s still a trend and not a sold-out product with a paused campaign.

Worth opening today: the five most advertised products, and whether their most requested variants are in stock, for how many days, and whether the reorder lands before they run out. An ad can be bringing in exactly the right customer for a grid that can no longer serve them.

Keeping the grid ahead of demand instead of behind it is exactly what a Flow Border dedicated account is built to track.