How long does it took to grow back hair?

I took my 8 mo puppy to the groomer for her first haircut and I told them specifically to trim her up. I said half inch off and they mistook it as half off and gave her a summer buzz cut 🤦.

I am so mad especially considering it is winter. Any idea how long it would take for a doodle to grow back hair?

Here is a before and after look of my pup for reference. Thanks!