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©2019-2025 Je Hyun Kim
30% Return rate
1 in 3 packages go back to where they came from.
According to CBRE, the average return rate for the e-commerce is 30%, compared to just 9% for physical retail. This gap highlights the value of in-person shopping when reducing returns.
In my early stage user research, I found that sizing is deeply personal. Most users don’t strictly follow online size charts. Instead, they rely on their own preferences - choosing what feels right rather than what technically fits. So how do we bridge the gap between physical and digital sizing?
Fold it to wear it
Fold the device just like you’d roll up your jeans or shirt. By adjusting it to match your preferred fit and silhouette, the device measures the garment’s length and strain using e-textiles. Over-time, this builds personalised database to determine your ideal size.
Left with only 1 size
Once my size is defined, there’s no more XS, S, M, L, or XL. There’s just my size—a monosize.
As an add-on to any e-commerce platform, Mono-fold makes it easy to find your fit by matching your monosize to the closest available option for any item you’re browsing.
Measurement data can be saved and organized by category—so if you’ve already found your perfect fit for, you won’t need to try it on again.
Start shopping with your size
Mono-fold reimagines the browsing experience by flipping the journey. Instead of starting with a design and hoping it fits, users begin with their ideal fit and silhouette. By turning the user's body into a physical mannequin for e-commerce, Mono-fold suggests clothes that match the fit—so all that’s left is choosing the design they love.
From physical to digital
To send physical clothes to the digital world, I created custom length and strain sensors using e-textiles. Through two familiar physical interactions—folding and stretching—the sensors accurately capture the length and strain of the desired fabric.
Printing the sensors
To make sure the sensor stretched naturally when folded, the TPU filament had to be printed directly onto the fabric. In a real production setting, this filament would be printed straight onto the suit itself—integrated seamlessly into the suit’s design.
Service blueprint
Mono-fold is not just a product - it’s a system. It blends physical interaction with digital experience, grounding abstract sizing and fit into something you can actually feel.
Process
For the e-textile sensors, I experimented with Arduino, conductive threads and materials, and 3D-printed components with TPU filament - bringing it all together using Python.
For the digital experience, I explored interaction design using a node-based visual programming language alongside prototyping in Figma.
Featured
2022 Imperial College / RCA Graduate Show
Project Type:
Duration:
Category:
Role:
Academic Solo Project
January 2022 - July 2022 (6-months)
Human Computer Interface (HCI), UX/UI Design
Ideation, Design, and Engineering