Guess the number

I come between two and four,
let's describe me a little bit more.
I'm half of six,
odd yet in my prime,
I'm also the square root of number nine.

The magic number; a hat trick,
this poem's not long
so have a guess, quick!

How many muskateers,
wishes, degrees,
coins in a fountain,
Beejees?

How many kings or wise men,
tenors, blind mice,
Charlie's Angels,
points for a win,
sides on a triangle?

I'm the holy trinity,
Tom, Dick and Harry,
french hens at Christmas,
strikes and your out!

If you haven't guessed me by now,
you must be thrice over the limit,
let's see,
mine's a triple
or maybe just a cup of tea.

Biscuits: All butter biscuit trio

Taste test: 8.2 out of 10

Cost: £1.86 from Waitrose in Lymington