Thank you for these informations.Agreed. Fitting should be measured rather than individual feeling. I always neglect on 'Fitting' review by many reviewers.
For your information as you might don't know yet, here is the rough summary of the O.D. of the front cover ordering from 'big' to 'small'.
- Astrotec Lyra Shell = Larger than Typical MX500 Shell (I don't have measurement data)
- Typical MX500 Shell = 16.9 mm. plus or minus 0.1-0.2 mm. depend on the front cover thickness.
- Typical PK & Shozy & Docomo Shell, Qian Shell and VE Monk Lite Shell = 16.2 mm. plus or minus 0.1 mm.
- Apple earpod earbuds Shell (very first gen) and Meizu EP-21HD Shell = 16.0 mm.
- Rose Masya & Mojito Shell = 15.5 mm.
A few Asian guy I know of, he can wear only Apple earpod size and below. Mostly guy get perfect fit around 16.2 mm. While many European guys have no trouble with MX500 but they get loose fitting easily on Rose earbuds.
I ve got the DIY mx760 graphene, and want to use earbuds as an office alternative to my Zeus XR Adel. Not SQ-wise of course, but as I find them less fatiguing than IEMs.
The problem is they don't stay well in my ears. So I'll try the smaller Toneking ROS1 (shipping). If they fit well, I plan to search something with same size and better SQ. That's why I need informations how the size of these several models reviewed here compare...