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Customer story · Ndure
A custom Shopify theme replacing the stock template plus a size-fit modal cut footwear returns and lifted PDP-to-cart by 1.4×. Faster mobile PDPs, sharper product imagery, and a no-friction size guide.
The problem
The client was Ndure, a footwear brand running on Shopify. Their product detail pages were on a lightly-customised stock theme that had grown app-bloat over two years (six conversion apps loaded on every PDP, two of them duplicating each other). Mobile LCP on a PDP was 4.1 seconds, and PDP-to-cart was sitting around 5.8 percent. The other recurring revenue leak was returns: 31 percent of pairs sold were coming back, the bulk of them flagged "wrong size", because the only sizing reference on the PDP was a static EU/UK/US conversion chart at the bottom of the page.
What we did
Custom Shopify theme built around the PDP. Hero image lazy-loads the next two angles in webp; the gallery loads on swipe, not on page load. Sticky add-to-cart with the size selector inline (no extra click). Replaced the six conversion apps with one consolidated solution and removed two of them entirely. Added a size-fit modal: user inputs the brand and size of a pair they already own; we map to Ndure's last and recommend a size. Built using Ndure's own returns data as the training signal so the recommendation actually reflects how their shoes fit, not generic brand averages.
The outcome
Twelve weeks after rollout, PDP-to-cart rose from 5.8 to 8.1 percent (a 1.4× lift). Mobile LCP dropped from 4.1 seconds to 1.6 seconds. Sized-related returns fell from 31 percent of orders to 24 percent — a 22 percent reduction in that bucket, which on Ndure's volume freed up roughly £40,000 a month in working capital previously stuck in reverse-logistics. The size-fit modal had a 68 percent engagement rate on first PDP view.
