668.79 EUR (115,500 JPY)
Delivery Information
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Please select product form first.
Size Chart For Helmet
How to measure the size of your head
First, measure the circumference of your head with a measuring tape.
Measure from the highest point of your forehead, just above your eyebrows, horizontally backwards to the highest point of the back of your head and around.
Based on the measurement, choose the size from the table below.
However, unlike hats, helmets cannot be sized by head circumference alone.
Also, helmets of the same manufacturer may feel different even if they are the same size depending on the model.

Ordering Size | XS | S | M | L | XL | 2XL |
Head Measurement (cm) | 53 - 54 cm | 55 - 56 cm | 57 - 58 cm | 59 - 60 cm | 61 - 62 cm | 63 - 64 cm |
* This universal size chart is for reference only. Sizes vary by manufacturer and product.
Product detail
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color Black and White
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color type solid
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Helmet SG mark ○
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Helmet PSC mark ○
Color: Black X White
[Material]
・Shell: Carbon Fiber, Kepler Fiber, Glass Fiber
・Interior: Nappa leather (lambskin) Alcantara
[Specification]
Ventilation
・Interior: Antimicrobial processing, Non-removable
[Standard]
・JAPAN / SG (New SG standard compliant)
・EU / CE standard
・Expressway is available
[Components]
・Presentation box
・Reflective seals
[Type of PS Mark] PSC
[Name of Notified Business Operator] Motorimoda, Inc.
[Name of Registered Inspection Body] Japan Vehicle Inspection Association
**About size selection
The size of Ruby helmet is tighter than Japanese one.
Recommending [one size up] the size worn by Japanese manufacturers.
Example: Wearing a Japanese helmet size M -> Ruby helmet size L
*Depends on the individual.This example does not apply to those with a more European head shape..
[About Ruby]
The aim of RUBY is to create "the best helmet in the world" in terms of both function and attractiveness.
All RUBY helmets are made of carbon fiber for maximum strength and light weight.
Manufacturing that does not allow any compromise.
Comfortable and discreet in style, it embodies a special relationship with its owner.
Attention to detail, the finest finishes, the feel of fine materials.
We will guide you to the incomparable comfortable world of RUBY, which has sublimated the helmet to the gem that everyone admires.
[Features of Ruby Helmet]
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The characteristic ridges are reminiscent of medieval knights, the braid is trimmed with chrome and genuine leather, and the metal emblem is like a brilliant jewel.
The cap of the helmet is manufactured with a layered structure of carbon fiber, Kepler fiber and glass fiber.
The surface and the entire shell are wrapped with multiple layers of carbon fiber.
Plastic injection molding makes it lightweight, durable, and more stylish.
A small pocket attached to the rear flap at the back of the helmet is a space for a card with emergency information.
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The burgundy interior, reminiscent of a vintage luxury vehicle, is made of several types of sponge of different densities and its surface is entirely covered with high quality nappa leather (lambskin).
The leather used is an environmentally friendly antibacterial material made by AEGIS (Ezion treatment).
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The design incorporates ventilation ducts into the interior to create airflow from the front of the head to the back of the neck.
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Comes with a crimson presentation box designed to protect the helmet from impact.
A reflective sticker is also included to increase visibility and improve safety.
Points of Attention
* The helmets sold on this site are based on the Japanese safety standard.
We are not responsible for accidents, damage, injury, or any other related matters as a result of purchasing this product.