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7 min readsize curve templateapparel size planning

Apparel Size Curve Template

A structured size curve template for apparel brands — covers size distribution by category, channel, and season, with prior sell-through inputs and buy quantity allocation by size.

What this template is for

The Apparel Size Curve Template provides a structured framework for building and applying size distribution curves — the percentage of total units that should be bought in each size — across a seasonal assortment.

Size curves are among the most consequential decisions in apparel buying. Buying the right total quantity but in the wrong size distribution produces the same financial outcome as buying the wrong quantity: stockouts in productive sizes, markdowns in overweight sizes, and lower overall sell-through than the plan required.

Best for: Apparel brands buying across multiple size ranges (XS–3X, 00–18, XS–XL, etc.) who want to move from applying generic size curves to building size curves from their actual sell-through history.


Free Template

Get the size curve template.

Pre-built size distribution template for apparel buying teams. Input your sell-through history and output size curves by category.

  • Size distribution input by category and product type
  • Historical sell-through by size with recommended curve output
  • Adjustable targets for run sizes vs. fashion styles
  • Works alongside your existing buy plan — add size depth from the curve output

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RetailNorthstar Editorial Team
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