How shoes are actually bought
Shoe buying is a size problem before it is a style problem: a customer finds a model they like and needs one specific size, which is frequently the one that sold out. A catalogue that does not show per-size availability wastes the visit. Fit varies between brands and models in ways customers know from experience but cannot check online, and returns in this category are expensive because the box comes back damaged.
What we build for a shoe store
First, per-size availability on every model, including per branch, since that is the whole purchase. Second, fit and width information, plus how the model runs relative to standard sizing, which is what prevents the return. Third, reservation for fitting in store, because most customers want to try before buying. Fourth, a clear returns policy and exchange route, since certainty about exchange is what allows an online purchase at all.