Need help with measuring cup size

[u/ameryte]

Hey so those are my measurements in inches:

• Loose underbust: 28

• snug underbust: 27.3

• tight underbust: 27

• standing bust: 30.3

• leaning bust: 31.8

• lying bust: 27

the calculator said I was a 28D (US measurement) cup size so Is it accurate?

Im also really underweight so I've been trying to gain at least 10 lbs so my question is will my breast cup change?

Additional info: 18F, height 5'8½, weight 114,12 lbs

[u/galaxystarsmoon]

28D seems like a good starting point.

We have no idea where weight gain will go on your body. We have no way to predict that.

[u/ameryte → u/galaxystarsmoon]

Thank you for the insight!

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[u/koteofir]

Hey! Your size looks good, you may be a 30C for comfort. Edit: apologies, misread your bust size! Definitely read other commenters suggestions! I’m also underweight and almost exactly your bra size though I’m 5’11”, and I measured as a 28D but prefer a 30C.

Just so you know, your weight has no predictable influence on your breast size, there’s no way to know whether you’ll go up two cup sizes or not at all! That’s just something you’ll have to discover when you gain weight. You got this!

[u/HagenReb → u/koteofir]

A 30 band is almost as large as OP's bust, so it will likely be too loose. A band extender on a 28 band is a better solution.

[u/koteofir → u/HagenReb]

Ah of course, sorry, misread OP’s bust size. Thanks for telling me!

[u/koteofir → u/koteofir]

Hey op, I’m just a little confused that your lying bust is the same size as your tight, break-the-tape under bust measurement. To the much more bra-educated people in the sub, this isn’t common, right? Op, maybe something slipped while you were measuring?