Component Density Drives Cost
Packing a battery, PPG sensor, Bluetooth radio and accelerometer into a ring’s tiny internal volume requires more precise, often custom-tooled components than a watch, where more internal space allows standard off-the-shelf parts.
Sizing Multiplies SKU Complexity
Unlike a one-size watch band, a ring requires manufacturing across a full size run (commonly 6-13, sometimes with half sizes), multiplying tooling and inventory complexity per unique product — a cost factor buyers should build into their pricing model from the outset.