No the reference size is 26/26.5 - full stop.
There isn’t a measurement reference size for men and a different one for women. All brands use the same lower shell for men & women, meaning “Hawx Prime is 100mm lasted, medium fit boot”. It is always a medium fit on every size, which means it is scaled for each size.
Usually, men’s development size is 26/26.5 and women’s development size is 24/24.5. Those are usually the first sizes to get completed when a brand makes a new boot. But there is only one reference size, which for most every brand is going to be 26/26.5.
Copy that. Thank you for the correction. The 24.5... I heard from several people in the boot industry, but not directly in the manufacturing end. It's always a good idea to revisit assumptions.
Part of my own problem is I've pretty much stopped paying much attention to numbers on boot boxes other than for the most general sort of guideline. So much so that the reference size sorta matters, but not alot as there are way too many other less measurable and probably more critical internal volumes (3d) in a boot that need to work, and the reference width is a 2d measure. Forefoot volume is super easy to change (within reason) if needed.
The classic example is the person with a very low volume ankle and instep, but has a wider forefoot with bunions who insists that they need a high volume boot. Here, the width reference number really doesn't matter and often keeps people out of a better fit. A good fitter sees the foot as a unique volume, checks mobility to determine range of functional motion, and has a good understanding of boot product, plastics, and what work can realistically be done on any given boot in their inventory, and importantly, what cannot.
Again, thanks for the correction.