A single footwear design is rarely a single product. Multiply one style by its colours, then by its sizes, sometimes by widths, and one design becomes many separate stock-keeping units. Each needs to be in the right store, in the right quantity, at the right time. That arithmetic, and the inventory complexity it creates, sits behind many of the profitability problems in footwear retail.
Why the size curve matters so much
Demand across sizes is uneven. Middle sizes sell fastest, while the smallest and largest sell slowly. A store that receives a full run of every size will sell out of the popular ones first and be left with outliers. Once a size run is broken, the style is effectively unsellable to most customers who walk in, even though stock remains on the shelf.
The size curve also varies by region and by store. One location may skew toward different sizes, or a particular width, compared with another. Allocating the same curve everywhere guarantees surplus in some sizes and shortages in others.
Inventory complexity: replenishment, space and seasonality
Footwear is bulky. Boxes take up stockroom space that is expensive in high-street and mall locations, so stores hold limited depth. That makes fast replenishment of popular sizes critical. If the warehouse cannot send a missing size quickly, the sale is lost or the customer is redirected to another channel.
Seasonal and fashion-led designs add risk. Sandals, formal shoes for the wedding season, sports styles tied to a launch and school shoes each have their own timing. Stock that does not sell through has to be marked down, moved to outlets or carried forward, and footwear styles can date quickly.
Returns add another layer. Online footwear returns are driven heavily by fit. Returned pairs need inspection and repacking, and damaged boxes can reduce resale value.
What operators are weighing
- Depth versus breadth: fewer styles in deeper size runs, or more styles in thinner ones.
- Store-level size curves: allocating from each store's sales history rather than a national average.
- Endless aisle: letting stores sell from central or online stock when a size is missing.
- Inter-store transfers: moving orphan sizes to where they sell, against the cost of moving them.
- Core versus fashion mix: how much of the range is continuity product that can be replenished all year.
The measures that reveal inventory health are sell-through by size, not just by style, the share of stock sitting in broken size runs, and gross margin after markdowns and returns. A brand reporting strong full-price sales on its best styles may still be accumulating dead stock in the tails of its size curves.
The decision that matters most is how much of the range a brand treats as core. A larger continuity range reduces fashion risk and allows steady replenishment. It also limits the novelty that brings customers back into stores, and that trade-off sits at the centre of every footwear range plan.
Questions this story answers
Why do footwear retailers end up with dead stock?
Demand across sizes is uneven. Middle sizes sell fastest, while the smallest and largest sell slowly, so stores sell out of popular sizes and are left with outliers. Once a size run is broken, the style is effectively unsellable to most customers who walk in.
How can footwear brands allocate sizes better across stores?
By allocating from each store's sales history rather than a national average, since size curves vary by region and by store. Brands also weigh endless aisle selling from central stock and inter-store transfers of orphan sizes, against the cost of moving them.
Which metrics reveal footwear inventory health?
Sell-through by size, not just by style, the share of stock sitting in broken size runs, and gross margin after markdowns and returns. Strong full-price sales on best styles can hide dead stock building up in the tails of the size curves.
