Is a B cup much bigger than an A cup?

I know A's are quite a bit bigger than AA cups. Are B cups moderately a bit bigger than A's or is it not really much of difference?
Answers:

Its my first time..?

An "A" cup means your bust width is one inch more than your band breadth.

A "B" cup is a two inch difference.

A "C" cup is a three inch difference.

Consequently, the cup size for a 34C is the same as the cup size for a 36B.

Fat Thigh!?

Its simply the next size up, abit bigger.

Unusual put somebody through the mill?

Not really much of a difference between A and B...I can usually fit into A cup or B cup, though my size really is a B. But, if there are no B's departed, I buy an A and I'm just fine.

Caution symbolic.is a tampon to big when..?

It actually depends on the decoration size a fair bit. Some bras I can wear a 32C, others I wear a 34B. The physical size of the cup is the pretty much duplicate. It would probably be the same as a 36A.

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I did not know a double A existed but no there is not a ample difference!

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B cups are a bit bigger.

Can anyone oblige me?

no not really
i guess it depends on the brand and style though