Problem Solution Pricing Roadmap Join Early Access
Size Intelligence for Fashion

We reduce return rates
for online fashion brands.

DerFit gives your customers the right size at checkout – and gives you the data behind every return.

Join Early Access Free 14-day trial · No credit card required
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Built by fashion founders
Shopify Native
Launching Q2 2026
Early Access Open

Every return hides
more than you think.

Return rates between 20–40% have become the norm. The biggest cause? Wrong sizing. And the costs go far deeper than the shipping label.

"The problem was never just the return. The problem is that no one gave you the data to prevent it."

  • Reverse Logistics
    You pay to ship it out. You pay to ship it back.
  • Lost Margin
    Restocking and inspection costs eat what's left.
  • Sitting Inventory
    Returned items rarely sell at full price again.
  • Conversion Loss
    Sizing doubt stops customers before they checkout.
  • Blind Production
    Without fit data, your next collection has the same problem.

How much are returns
really costing you?

Your Numbers
Monthly Revenue50,000 €
Return Rate30%
Avg. Order Value80 €
Return Processing Cost12 €
Your Cost Breakdown
Monthly returns
188
returned orders per month
Monthly cost
15,000 €
lost revenue + processing
Annual cost
180,000 €
what you lose every year
Potential savings with DerFit
54,000 €
at 30% return rate reduction

Ready to recover these losses?

Join Early Access →

Size intelligence
for every brand.

DerFit gives your customers the confidence to buy the right size – and gives you the data to understand why they didn't.

✦ 01
Fewer Returns
Accurate size recommendations at checkout – before the wrong decision is made.
✦ 02
Higher Conversion
Sizing doubt is the biggest cart abandonment reason. Remove the doubt, recover the sale.
✦ 03
Real Fit Data
Know exactly how your products fit real people – not just size charts.
✦ 04
Less Dead Stock
Returned items that never make it back to full price stop being your problem.

Simple, transparent
pricing.

Monthly
Yearly Save 20%
Free Trial
14 days
No credit card required
Full access · All features
  • Size recommendation engine
  • AI body scanner
  • Manual measurement input
  • Basic analytics
  • Advanced insights
  • Priority support
Start Free Trial
Starter
29
per month
500 scans · €0.05 per extra
  • Size recommendation engine
  • AI body scanner
  • Manual measurement input
  • Basic analytics
  • Customer feedback
  • Advanced insights
Get Started
Intelligence
Custom
based on brand size
Unlimited scans
  • Everything in Growth
  • Advanced dashboards
  • Size heatmaps
  • Category analysis
  • Strategic sizing intelligence
  • Dedicated account manager
Contact Us
🔒 Founding Partner
40% off your first year
Available for the first 20 brands only.
  • Early access before public launch
  • 40% discount on annual plan
  • Direct influence on product development
  • Founding Partner pricing locked forever
  • Founding Partner badge in App Store
Secure Your Spot →
Limited spots. No spam, ever.

Where we're going
and why it matters.

Phase 01Now
Size Intelligence
Accurate size recommendations at checkout. Reduce return rates from day one.
Launching Q2 2026
Phase 02Next
Fit Data Insights
Analytics and sizing diagnostics. Understand how your products really fit.
Coming Soon
Phase 03Future
Inventory Optimization
Data-driven production decisions. Stop guessing what sizes to produce.
Planned
Phase 04Vision
Industry Intelligence Layer
Cross-brand insights. DerFit becomes the intelligence backbone of fashion commerce.
Planned

Ready to stop
guessing?

Join the brands building smarter. Get early access to DerFit and be the first to know when we launch.

Limited spots for founding partners. No spam, ever.