Dress for a 40th birthday party?

[DogPoolPeggy]

Haven't been to a party in 10 years
Seriously

Have no idea to wear.
Pub/function room party

I'm late 30s. Size 12. Mum tum. 5ft5
And baffled at what is appropriate

Everything seems too church weddingy or too young for me

What would you prefer: jeans, co-ords or actually a dress?

And what’s your budget?

Do you like the look of:

Batsheva

or

Damson Madder

or

Klements

or

Realisation Par

or

R13

Are any of these looks close to how you would ideally dress for a party?