Oh, that is a really cute harness!!!
I'd buy it for Sylphide if she didn't chew through nylon
Don't feel bad about getting the harness right. You should have seen us try to figure out the harness thing with Sylphide when she was a pup. We couldn't even figure out how to put them on.
We got it down pat now though. Fitting Shrek was a cinch!
We started out with something called a comfort wrap, xtra small. It's easy to put on, and fit for the first few months. We followed that with the next size up.
The problem we had with Sylphide is that she would chew her way through her nylon harness and leashes in the few minutes of getting ready for a walk and going outside, or sitting in the car (we have three dogs, so getting ready for the walk is a complicated affair).
I finally ordered a wonderful pink leather harness that she can't chew through (I tell her: narnarnarnarna!). Shrek is still fitting in the comfort wrap. I'll also be ordering him a leather harness in the next size up very soon.
So, depending on how big your baby grows, you may go through one or two sizes....