A UK40 chest label helps narrow a motorcycle clothing search, but it does not describe sleeve length, body shape or the room required for your riding layers. Start with the appropriate garment chart and assess the whole fit. Jackets, suits and separate protective equipment must each be checked against their own sizing instructions.
Measure your body, then read the chart
For chest measurement, RST directs riders to keep the tape level around the fullest part, beneath the arms. Its men's jacket and one-piece suit chart pairs UK40 with EU50 and S. Use that as an RST reference rather than a conversion for every brand. A measurement around your body is also different from measuring a jacket laid flat, so check which information a chart asks for.
Try the garment in riding posture
Zip or fasten the garment and reach forward as you would on the motorcycle. Notice the collar, shoulders, sleeve ends and hem rather than checking the chest alone in a standing position. Bring the trousers and gloves you plan to use so you can assess their overlap and fastening arrangements. If a jacket pulls at one point while feeling loose elsewhere, compare its cut instead of assuming the same adjustment will fix every area.
Check what the size does not tell you
Read the exact product specification for included protectors, optional inserts and weather features. A pocket prepared for an insert does not establish that the insert is supplied. For example, REV'IT!'s Automate description identifies provision for separate back and chest inserts. Confirm compatibility and fit for your chosen garment; the UK40 filter alone establishes none of those details. Gallery images are illustrative designs rather than a promise of a particular size or equipment package.
Compare your options at Moto Central
Bring your chest measurement and the riding layers you intend to use to Moto Central. We can help compare the garment chart, cut and equipment details before you choose.
