Sleepycat × OptiPhoenix:An Interactive Mattress Size Guide Drove a 49.29% Conversion Rate Uplift

Published: Fri Nov 13 2026/Updated: Fri Nov 13 2026/by: Vrity Singh

The Challenge

Sleepycat is a D2C sleep and wellness brand offering sleep products designed to improve sleep quality through comfort and ergonomic design. Choosing a mattress size is the step where many shoppers stall. On the mobile Product Detail Page (PDP), the existing Size Guide had low visibility and low engagement. Only about 8% of users reached the size selection section, and the video-first guide received little attention. Roughly 10% of customer support tickets related to incorrect size selection and exchanges.

OptiPhoenix partnered with Sleepycat to test whether a clearer, quicker Size Guide would help shoppers pick the right size with confidence and move toward purchase.

Finding the Missing Signal

A mattress is a large, considered purchase. A wrong size is costly for the shopper and for the brand, so shoppers look for proof that they are choosing correctly.

The existing guide asked them to watch a video before they could find that proof. Many did not. So the gap sat between a shopper who wanted to confirm their size and a guide that was hard to find and slow to use at the moment of choice.

The Hypothesis

OptiPhoenix proposed replacing the video-first guide with a quick, visual Size Guide. It would include measurement instructions, categorized mattress sizes, bed illustrations, and optional video support. Information would be easier to discover and consume, so more users would identify the correct mattress size with confidence. This was expected to reduce sizing friction and improve purchase progression.

The Experiment

OptiPhoenix ran a controlled A/B test on Sleepycat’s mobile Product Detail Page. The test ran for 14 days.

Sleepycat Mattress Size Guide UX Design – Original vs Variation

Variant A (Control): The original PDP, with the video-first Size Guide that few users reached.

Variant B (Test): A Size Guide CTA (“Find Your Mattress Size”) placed near the size selection on the PDP, and also inside the Choose Variant bottom sheet. The guide showed step-by-step measurement instructions with bed illustrations and size categories. It also included a short video guide. Users could return to the PDP or the Choose Variant sheet with one tap.

Metrics measured: Conversion Rate, Revenue per Visitor (RPV), and Net Revenue.

The Result

Giving shoppers a fast way to confirm their size moved more of them to purchase.

Sleepycat A/B Test Results – 38% RPV and 40% Net Revenue Increase

Conversion Rate rose 49.29%. Revenue per Visitor rose 38%, and Net Revenue rose 40%.

Impact

49.29% increase in Conversion Rate
40% increase in Net Revenue
38% increase in Revenue per Visitor
Measured over a 14-day test on mobile

Lessons Learned

Put help where the decision happens. The Size Guide now sat beside the size options and inside the variant sheet. Shoppers no longer had to look for it.

Lead with the quick answer, then offer the video. Step-by-step instructions and bed illustrations let shoppers confirm a size in seconds. The video stayed available for those who wanted more detail.

Fewer wrong choices help both sides. About 10% of support tickets related to incorrect size selection and exchanges before the test. The deck does not report a change in tickets, so a follow-up check would show whether the guide also reduced that load.

Partnership Snapshot

What Matters

Sleepycat‘s shoppers were not unsure about the mattress. They were unsure about the size. By placing a quick, visual Size Guide beside the size options, OptiPhoenix answered that question at the moment of choice. Conversion Rate rose 49.29% and Net Revenue rose 40%.