Description

The STEPPER Eyeglasses SI 10021 F550 are a lightweight, ergonomically engineered optical frame from Stepper’s SI series, designed for maximum comfort, durability, and everyday wearability. Like other Stepper models, it focuses on German-style precision fit and pressure-free long-term use.

The SI 10021 features a full-rim rectangular silhouette, giving a clean and professional look that works well for office and casual wear. The F550 color code is commonly associated with a blue finish (often matte or soft translucent blue), which adds a subtle modern and slightly sporty touch without being flashy. Similar Stepper F550 variants are known for this calm, cool-toned aesthetic.

It is typically constructed from lightweight materials such as acetate or titanium-composite blends (depending on production batch), designed to reduce pressure on the nose and ears. Stepper’s design philosophy prioritizes even weight distribution and flexible comfort, making it suitable for all-day wear.

Key specifications (based on SI-series sizing patterns)
Lens width: ~53–54 mm
Bridge: ~13–16 mm
Temple length: ~135–140 mm
Frame type: Full-rim rectangular
Material: Lightweight acetate / titanium composite (variant dependent)
Fit: Medium, everyday comfort fit
Key Features
Brand: Stepper
Model: SI 10021
Color: F550 (Blue tone finish)
Design: Minimalist German ergonomic styling
Comfort: Ultra-light, pressure-reducing construction
Fit: Balanced for long daily wear
Lens compatibility: Single vision, bifocal, progressive
In simple terms

This is a light, comfortable rectangular frame with a subtle blue finish, made for people who want something durable, simple, and easy to wear all day without pressure points.