For helmet care products and guidance, see ECE 22.06 certified helmet.
Getting helmet sizing right starts with a proper head measurement, taken with a soft tape around the largest part of the head, just above the eyebrows and ears. That figure points to a starting size, but it is only a starting point, since head shape varies as much as head size.
A jacket built for riding, rather than a fashion jacket that merely looks the part, adds abrasion resistance across the shoulders and HedonHelmets elbows, and many include pockets for armour inserts. Boots that cover the ankle protect a joint that takes real force in an off, and trousers or riding jeans extend that same protection down the leg.
This kind of workshop sits closer to a design studio than a factory. Colourways, trims and finishes are developed the way a small run of any crafted object would be, with samples, adjustments and a final sign off before anything reaches a rider.
For replacement visors and care products, see ECE 22.06 certified helmet.
The trade off is scale. A workshop like this will never produce helmets as fast as a large factory, and that is treated as acceptable, since the aim is a considered, well finished helmet rather than the fastest one to market.