Primark Retails Assistant interview questions

It was a half an hour chat with a manager discussing my CV and some scenario questions. It was all customer service based questions and afterwards was asked what size shirt I am and what times I am available.

The interview had a good start but slowly began to decline because i started to stutter due to having no experience in interviews as it was my fisrt time attending one. Overall the interviewer was nice and i blame my not getting the job for my inexperience in interviews.