Why different size jackson skates have same heel height?

[Query]

The (external) heel heights of size 5.5 and 9 Jackson Womens' Freestyle (model) boots are both just over 2 inches. They do not scale with the size of the foot. Does that make sense?

My measurements were crude. I.e., maybe I should have measured the height of the heel inside the boot, and tried to take into account the heights of different parts of the (Aspire XP) blades.

When I measured a new pair of (only factory sharpened) Aspire XP blades on Freestyle boots, the left and right blades had significantly different profiles. Plus, different coaches say to use different parts of blades when doing turns and other moves. So it is hard to determine what foot angle is created during specific moves, which means it would be hard to claim Jackson is trying to create a specific foot angle on specific moves.

Can someone with a better understanding of heel heights explain this to me?

I suppose one could say these are cheap boots and blades, and they are trying to keep manufacturing costs down. And I suspect that tstop4me would claim I have insufficient data to any conclusion - e.g., that I should make full shape and size measurements of different Aspire XP blades of many sizes.

Maybe. Jackson is a very reputable figure skate manufacturer. I would hope that they would try to make reasonably good design decisions.