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I've been sitting and thinking about this and I'm wondering if there's any sort of write up simplifying it. Let me try to explain what I'm wanting to understand better;
Basically, the concept I'm thinking about is the scaling of small band/large cup bras, particularly with the effect the combo has on fit, and why it seems so hard to ... find a good band fit while seemingly between 28/30 band sizes.
Naturally, a band of a certain size should fall within a certain range of measurements stretched and unstretched, with the intent being to stretch some amount so as to provide support.
However, as far as I can tell, most of the stretch seems to come from the part of the band from the outside of the wires to the clasps. Basically, the back of the bra. Is this actually the case though?
My train of thought here is that, with each cup size the cups tend to get wider. This seems obvious in my size range in UK bras which seem to run unreasonably wide. But even for brands that seem to scale the cup width sensibly, realizing that breasts do not tend to wrap around to the back for most people, you can expect the wires to get wider.
Naturally, if the wires get wider, then if my first observation is right, then the part that does most of the stretching would like shrink accordingly, or at least do so slightly once every so many cup sizes.
Maybe this isn't so much of a problem on a larger band, but on a small band there's not much band length for the cups to "cannibalize" - so is my thought process right to think that it would be expected for the same bra in the same band size to measure fairly different at vastly different cup sizes? I haven't studied the measurements to get a feel for this, and even if I wanted to there's often not much info to go off of in the 28K range that I'm most interested in.
Does what I'm trying to explain make sense? Basically, that a bra that measures the same band length unstretched in both, for example, an E cup and a K cup, could effectively be tighter at the K cup due to the area doing the most stretching making up less of the unstretched length.
Not that I think the entire front of the bra doesn't stretch just that it seems like it does so less. Maybe I'm entirely wrong, or maybe it varies wildly on fabric and style(probably)
I better go to bed, I'm confusing myself now lol
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Shared on Mar 17, 2023 Flag this
I just recieved the Lilou bra directly from Comexim in an 85F. The band is a bit too tight for me and the cup width is a little too narrow. I have two 38F Comexim bras from Breakout Bras 
What is the “ratio of hemispherical size”? I haven’t heard of that before so I’m curious about that.
I usually measure from were my boobs start (when supported) compared to my armpit versus how high or low set my boobs are on my chest wall.
@Loxus fFom what I recall, it was a reposted comment on the Reddit from here. I've been trying to read a lot of information, so I'd have to go back and find it but I can do that. I think what it's saying is that, compared to your horizontal hemisphere, an average root is somewhere close to that same number from I guess IMF to the top of your root? I didn't really understand that one myself, but I decided to tack it on just in case it was correct.
Supported, I don't have a very obvious bulge or line at the top of my tissue, it's fairly smooth as a transition. If I press and push up, it definitely has a distinct point where the breast tissue does not go any higher. The top of that point is approximately the width of four fingers, almost a full palm, from the bottom of my collarbone to the top of the mound where it attaches to my chest wall. I have a fairly long torso so I know that can skew things. The top of the mound is about equal to my armpit. It's kind of hard to describe, but I can post a picture if need be.
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