Is my Rose-Hair T an adult?

Could be, but it's hard to tell. I had a Rosie that was an "adult" for 2 years before showing it was a male. You can confirm sex with the next shed.

 
Seems a little small to be an adult. Perhaps one or two molts away. I'm leaning female, but like rockpython, I used to have one I swore was a female until it molted into a mature male. If it ends up being female, it will molt until it dies. If it's a male, it will stop molting after maturing (or should at least, though some T keepers have had mature males molt again, often with very little success though).

On an unrelated note, I like the pics you have of your pinned insects :) You're a collector then?

 
Thanks for the info!

Oh, I just noticed you can scroll and see the other pictures! Yup, I'm an avid insect collector and breeder, a fledgling entomologist and wannabe tropical cockroach taxonomist. :)

 
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