Bra fit without a bra?

I’m from the UK and the other week, I went to get a bra fitting. I went in and a young girl helped me with getting my size etc. However, when I needed to put a bra on, she said I could take my bra off in front of her and she would help me into the new one.

Is that normal practice or is that odd?

Bra fit without a bra?
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