How to get measurements without suspicion?

I need to get measurements for a special someone for their first fursuit
The species is a fox that will be a partial. I am a girl suit maker and he is a boy
I will be making feetpaws, head, hands, and tail.
I do not know his head measurements, feet measurements, etc.

How can I either
a) Ask without seeming suspicious (this is a surprise for him)
b) Figure out good measurements without saying anything?

Thanks guys!