hi everyone on this thread - I also hope to be able to get a harness on my
. I have almost the same exact problem as marie: my Gcc has a big head, the neck loop of the petite is way too tight, i cant even get it on, and i tried the x-small, and its neck loop is huge. so i basically gave up because Aviator is the best brand out there. then my Gcc had his spook-out incident and we have since been occupied with confidence building, so I pretty much gave up, what with the sizing problem on the one hand, and his confidence problem on the other hand.
but now, i feel a little hopeful again - maybe once Ringo (my Gcc) improves, I could order the CUSTOM SIZED harness that the Parrot University described in Tro's post above. This would be SO cool - I'm assuming it would mean something like taping a ruler to a wall, placing your bird next to it, and taking a photo, and sending it off, so they could get a sense of how big your bird's head is, and try to make a harness for it. i think it might take a couple of hit or misses - but thank you Tro for sharing this info with us. it gives me renewed hope that my Gcc and I may one day enjoy the great outdoors together.
I also have a very cheerful and sweet bourke parakeet, who I know would love to spend the day outside with me. i have frequently thought of a harness for him but he hates having his body and wings handled, he only likes kisses on the tummy, neck scritches, and beak rubs. so I have never tried with him. but the size for him i imagine would be the petite.
anyway - want to wish you all luck with the harness, and I encourage you all to keep the rest of us posted on your progress!