Connect Sontec with Zalando: size tables, content, and returns under control

Zalando has the highest data requirements of all German marketplaces. DezemberHub prepares your Sontec data so that your catalog passes the quality review and goes live quickly. Size tables, content, and inventory are all aligned, for both Connected Retail and the Partner Program.

December 2025 8 min read By DezemberHub Team

Connecting Sontec to Zalando means: translating Sontec product data into the Zalando format, mapping size tables, and continuously keeping inventory, orders, and returns in sync. DezemberHub handles this as an adapter, without you having to change your main system.

Zalando is a central sales channel in Europe for many fashion retailers and brands, and places high demands on product data, content, and processes. The channel is therefore best suited for retailers with well-maintained assortments.

Sontec is an established ERP system in textile and shoe retail, used by many mid-sized specialty retailers. It manages purchasing, warehousing, stores, and customers in a single system. Connecting to Zalando requires an adapter that cleanly maps product data, size tables, and logistics processes.

DezemberHub knows both worlds. We translate your Sontec data into Zalando's language and ensure your assortment meets the platform's quality requirements. Whether you need the Zalando Partner Program for brands or Connected Retail for brick-and-mortar retailers, you get the right solution.

In brief: The Sontec Zalando integration is an interface that automatically translates product data from the Sontec ERP into the format required by Zalando. It maps size tables, prepares product content to Zalando's standards, and keeps inventory, orders, and returns in sync between both systems. Sontec remains your main system, while DezemberHub works as an external adapter. The integration is typically set up within a few weeks.

Zalando Partner Program vs. Connected Retail

Zalando offers two programs for retailers:

  • Partner Program: For brands and wholesalers. You ship directly to the customer. Higher margin, but more logistics effort.
  • Connected Retail: For brick-and-mortar retailers. Your store inventory is offered on Zalando. Customers order online, you ship from the store.

DezemberHub supports both models through your Sontec installation.

What is synchronized between Sontec and Zalando?

Zalando has the most demanding data standards of all German marketplaces. The Sontec Zalando interface handles all requirements:

Size tables & fit

Zalando expects precise size tables per brand and product type. DezemberHub maps the Sontec size grids to Zalando's sizing system. Body measurements, shoe lengths, and fit information are transmitted correctly. This is important for keeping return rates low.

Returns & refunds

Zalando often sees higher return volumes in the fashion segment. DezemberHub ensures that returns are automatically posted in Sontec. Inventory is updated and credit notes are generated.

Product content to Zalando standards

Zalando reviews every product before publication. Images must meet specific requirements (model photography, white background), and descriptions need a defined format. DezemberHub transforms your Sontec product data into Zalando-compliant format and flags any missing required fields.

Inventory & orders

Warehouse inventory from Sontec is transmitted to Zalando in real time. New orders flow back into Sontec automatically. Tracking numbers and carrier information are passed to Zalando so customers can track their delivery.

The path to the Sontec Zalando interface

The Zalando integration requires more preparation than other marketplaces. In return, the channel is particularly effective for fashion retail:

1

Sontec analysis & Zalando readiness check

We check whether your Sontec data meets Zalando's requirements: are all EAN codes present? Do you have model photos of sufficient quality? Are size tables stored per brand? If gaps exist, we show you exactly what needs to be provided.

2

Adapter development & content transformation

DezemberHub builds the adapter between Sontec and the Zalando Partner API (ZalandoS). Particular focus is placed on content transformation: product descriptions are brought into the Zalando format, size tables are correctly assigned, and image URLs are mapped. We ensure your catalog passes the quality review.

3

Pilot phase with close monitoring

We start with a manageable product selection. Zalando provides feedback on every submitted item. We respond to that feedback and optimize iteratively. Once the process runs smoothly, we scale up to your full range. We monitor the return rate together so we can adjust size recommendations as needed.

What Sontec retailers achieve with Zalando

The combination of Sontec and Zalando offers tangible benefits for fashion retail:

  • Strong visibility in the fashion space: Zalando is Germany's largest fashion marketplace. Being present here reaches fashion-conscious customers who actively search by brand and size.
  • Connected Retail for brick-and-mortar retailers: Do you run a physical store with Sontec? Via Connected Retail, you can offer your in-store inventory on Zalando without needing a separate online warehouse. Zalando customers near you can find your products.
  • Brand presentation at a high level: Zalando offers brands a strong editorial environment and high-quality product presentation. For many fashion brands, this is an important factor in their channel mix.
  • Sontec remains your primary system: No additional software, no system change. DezemberHub operates as an external adapter. Your staff continue working with Sontec as usual.

Supported features at a glance

Swipe to see all columns

Function Status
Product export with Zalando content
Size chart mapping
Real-time inventory synchronization
Order import into Sontec
Return processing
Shipment tracking
Connected Retail Support
Partner Program Support
Zalando Marketing ServicesOn request

Frequently asked questions about the Sontec Zalando connection

How do I connect Sontec with Zalando?

The connection between Sontec and Zalando runs via an adapter that translates Sontec product data into the Zalando-compliant format. DezemberHub maps size charts, transforms content to Zalando standards, and synchronizes inventory, orders, and returns between Sontec and Zalando.

What is the difference between the Zalando Partner Program and Connected Retail?

The Partner Program is aimed at brands and wholesalers who ship directly to customers. Connected Retail is for brick-and-mortar retailers who offer their store inventory on Zalando and ship from the shop. DezemberHub supports both models via your Sontec installation.

How are Zalando returns recorded in Sontec?

Returns are automatically recorded in Sontec. Inventory is corrected and credit notes are created. Accurate size charts and model photos also help customers find the right size from the start.

What image requirements does Zalando have for products?

Zalando requires professional product photos, ideally with model photography. At least one cut-out image is mandatory, and images should be at least 1500x2100 pixels. DezemberHub flags missing or unsuitable images before products are submitted to Zalando.

Can I sell on Zalando in other countries via Sontec?

Yes. Zalando is active in many European markets. DezemberHub configures the connection for multiple countries, including country-specific pricing, shipping options, and localized product descriptions.

How long does it take to connect Sontec with Zalando?

The connection is typically live within a few weeks. The exact timeline depends on data quality in Sontec: if EAN codes, size charts, and model photos are complete, it goes faster. We start with a manageable product selection, respond to Zalando feedback, and then scale up to your full range.

Connect Sontec and Zalando?

Start for free or give us a call. We check your Sontec data for Zalando readiness and show you the concrete path to your first live listing. 30-day trial, email address only, no payment details required.

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