Data Purl
  • Platform
    • Coverage400+ retailers across the US, UK, Europe and Asia, history back to 2013
    • Shelf IndicesFree monthly price and discount indices by category and country
    • Brand headlinesQuarterly prices and markdowns for 84 consumer brands
    • Custom dataResearched extracts scoped to your sectors, brands and dates
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Client loginStart free
  • Platform
    • Coverage400+ retailers, history back to 2013
    • Shelf IndicesFree monthly price and discount indices
    • Brand headlinesQuarterly prices for 84 consumer brands
    • Custom dataExtracts scoped to your sectors and dates
    • How we build it
      MethodologyHow we collect, classify and map brands
    • ValidationQuality screens and backtests
  • Solutions
  • Pricing
    • Research
    • Blog
    • Glossary
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  1. Home
  2. /Glossary
  3. /Assortment count
Glossary

What is assortment count?

The number of distinct products a brand or retailer has live for sale at a point in time.

Definition

Assortment count is the number of distinct active products. It can be measured at style level (one product in any color or size) or at SKU level (each color and size combination).

How Data Purl measures it

Data Purl counts active products per brand, retailer and category each week, with SKUs grouped into products so that a new colorway is not mistaken for a new product line.

Why it matters

Assortment expansion or contraction is an early read on a brand's strategy: a cut in wholesale assortment, a push into a new category, or a retailer narrowing its range ahead of a weak season.

Pitfalls

  • Retailer website changes can create or remove listings without any real change in the range. Check step changes at one retailer against others carrying the same brand.

Related

New-product share (new entrants)Share of shelf (online)DTC vs wholesale mix
  • Commercial due diligence with eCommerce data
  • Detecting assortment cuts and SKU rationalization
  • Using eCommerce data in a consumer earnings preview
  • Build vs buy: scraping retail pricing data yourself

See the data for your coverage

Start free in the analytics portal, or talk to the founders about the full dataset delivered to Snowflake or S3.

Start free Talk to the founders
Data Purl

Data Purl is an eCommerce pricing and assortment data provider that follows every brand across the retailers that sell it: SKU-level price, discount, availability and assortment history across 400+ retailers back to 2013, compared like for like, with brands resolved to their owners, public or private, and listed owners mapped to tickers.

+44 20 8125 3010 (UK)+1 212-660-0780 (US / International)

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400+
retailers
1,900+
public companies mapped
4,000
product categories
2013
history back to

© 2026 Data Purl. All rights reserved. Data Purl is a trading name of Cleveland Alternative Data Limited, a company registered in the United Kingdom with company number 16234509. Registered office: Basement, 52 Cleveland Square, London W2 6DB. Contact: support@data-purl.com.